id_ddm stringlengths 32 32 | dialogs listlengths 2 2 | ground_truth stringclasses 10
values | domain stringclasses 3
values |
|---|---|---|---|
296634b8c949445facd9aacedc92d1bd | [
{
"role": "user",
"content": "A solid element (monoatomic) exists in cubic crystal. If its atomic radius is $1.0\\mathring { A } $ and the ratio of packing fraction and density is $0.1{cm}^{3}/g$, then the atomic mass of the element is $\\left( { N }_{ A }=6\\times { 10 }^{ 23 } \\right) $\n\n(A) $$4\\pi $$... | G | Physics |
af0bf305f03e48b0bc5bf91ba4a51363 | [
{
"role": "user",
"content": "XY crystallises in bcc lattice .The unit cell edge length is 400 pm . Molar mass of XY is 200. The density of crystal in gm/cc is $\\left( N_{ A }=6\\times 10^{ 23 } \\right) $\n\n(A) 2.6 \\times 10^{6} \\text{ gm/cc}\n(B) 2.6 \\times 10^{-3} \\text{ gm/cc}\n(C) $10.4\\times 1... | E | Physics |
941e4b3e4f7c4594b486d26a76c7c26e | [
{
"role": "user",
"content": "A charge particle of charge $q$ and mass $m$ is clamped rigidly at the circumference of a ring with mass $m$ and radius $R$. Initially ring is in vertical plane resting on a sufficiently rough horizontal surface with charge $q$ at the same horizontal level as that of the center... | A | Physics |
0d466d2936284e30953e896bf5ce6a51 | [
{
"role": "user",
"content": "The ratio of maximum to minimum number of electrons that have magnetic quantum number m = +1, spin quantum number s = +$\\frac{1}{2}$ in Cr atom:\n\n(A) \\frac{7}{3}\n(B) \\frac{7}{4}\n(C) $$\\frac{4}{1}$$\n(D) $$\\frac{5}{2}$$\n(E) $$\\frac{3}{2}$$\n(F) \\frac{5}{3}\n(G) \\fra... | E | Physics |
9bddec4599a14051b11023ee84bdac77 | [
{
"role": "user",
"content": "A non-conducting ring of radius $0.5$ m carries a total charge of 1.11 x ${ 10 }^{ -10 }$C distributed non-uniformly on its circumference producing an electric filed $\\bar { E } $ every where in space. The value of the line integral $\\int _{ \\ell =\\infty }^{ \\ell =0 }{ - ... | I | Physics |
dc538cc592d746c4a4028d201890636e | [
{
"role": "user",
"content": "In the ionic equation, $xCH_3CH_2OH+yI_2+zOH^-\\rightarrow CHI_3+{HCO_2}^-+I^-+H_2O$, the valuexs of $x,y,z$ are:\n\n(A) $$x=1, y=8, z=8$$\n(B) x=1, y=4, z=8\n(C) x=1, y=4, z=5\n(D) x=1, y=3, z=6\n(E) $$x=1, y=6, z=4$$\n(F) x=1, y=4, z=7\n(G) $$x=1, y=4, z=6$$\n(H) $$x=1, y=8, ... | G | Chemistry |
63365bd6e7984cdb8b3710497f444a4b | [
{
"role": "user",
"content": "A potential difference of $ 10^{3} V $ is applied across an X-ray tube. The ratio of the De-Broglie wavelength of the incident electrons to the shortest wavelength of the incident electrons to the shortest wavelength of X-rays produced is {e/m = $ 1.8 \\times 10 ^ {14} $ C/Kg f... | B | Physics |
6890120c1ba943ec98c65b9015a36e40 | [
{
"role": "user",
"content": "An oxyacid of phosphorus has the following properties: The complex neutralisation of the acid with sodium hydroxide solution given an aqueous solution of sodium ions and oxy-acid anions in the ratio 2:1. When a solution of the acid is warmed with silver nitrate solution, metall... | D | Chemistry |
e2b904d9186d4dd6bc991c43b3310a0f | [
{
"role": "user",
"content": "The density, \\rho of air at STP is 0.00129 g/cm^3 , the specific heat capacity at constant pressure is 0.238 cal/g - 0K, and the ratio of the principal specific heats is 1.40. what is the mechanical equivalent of heat?\n\n(A) 2.23 × 10^7 ergs/cal\n(B) 3.23 × 10^7 ergs/cal\n(C)... | D | Physics |
54dfaff095b7439cbee11e0afaa243b5 | [
{
"role": "user",
"content": "Human senses can be divided into which two major categories based on what the senses gather from the outside world?\n\n(A) tactile and olfactory\n(B) internal and external\n(C) energy and chemical\n(D) proximal and distal\n(E) auditory and visual\n(F) biological and physical\n(... | C | Biology |
2a6882c3a4434570b9c24204fb766c35 | [
{
"role": "user",
"content": "A snowball at - 15°C is thrown at a large tree trunk. If we disregard all frictional heat loss, at what speed must the snowball travel so as to melt on impact? The specific heat of fusion of ice is 79.7 cal/gm.\n\n(A) 810 m/s\n(B) 1100 m/s\n(C) 763 m/s\n(D) 853 m/s\n(E) 950 m/s... | D | Physics |
d844e17297f54eb2a56841f70659abfe | [
{
"role": "user",
"content": "A simple harmonic progressive wave, in a gas, has a particle displacement of $y=a$ at a time $t=\\dfrac{T}{4}$ at the origin of the wave and a particle velocity of $y=v$ at the same instant but at a distance $x=\\dfrac{\\lambda}{4}$ from the origin where $T$ and $\\lambda$ are ... | C | Physics |
e8be84272ccd4268810a25333d355552 | [
{
"role": "user",
"content": "A steel rod of length L = 20 cm and cross-sectional area A = 3 cm^2 is heated at one end to T_1 = 300°k while the other end rests in ice. Assuming that heat transmission occurs exclusively through the rod (without losses from the walls), calculate the mass m of the ice melting ... | C | Physics |
75137178e29747f9975dc7624cca3109 | [
{
"role": "user",
"content": "An interference is observed due to two coherent sources separated by a distance $5\\lambda $ along positive y-axis, where $\\lambda $ is the wavelength of light. A detector D is moved along the positive x-axis. The number of points on the x-axis excluding the points x=0 and $x=... | E | Physics |
df3535d186c749e98cc8f29f73fbb88b | [
{
"role": "user",
"content": "Calculate the extent of hydrolysis and the $pH$ of $0.02\\ M$ ${CH}_{3}COO{NH}_{4}$. $[{K}_{b}({NH}_{3})=1.8\\times {10}^{-5}$, ${K}_{a}({CH}_{3}COOH)=1.8\\times {10}^{-5}$]\n\n(A) $0.56$%, $pH=7$\n(B) $0.44$%, $pH=10$\n(C) 0.58%, pH=6\n(D) 0.64%, pH=8\n(E) $0.54$%, $pH=6$\n(F)... | A | Chemistry |
cb20d38954004f469f3167d280fb2dd3 | [
{
"role": "user",
"content": "At a certain temperature for which $RT =2.0\\ lit\\ atm\\ mol^{-1}$, the density of a gas, in $gm\\ lit^{-1}$, is $d=2.00 p+0.020p^{2}$,where $p$ is the pressure in atmosphere. What is the molecular weight of the gas in $gm\\ mol^{-1}?$\n\n(A) 65\n(B) $$100$$\n(C) $$45$$\n(D) $... | D | Chemistry |
4ff2dea12e644df7a3f6f95f074eac37 | [
{
"role": "user",
"content": "A charged particle produces an electric field with a magnitude of $2.0 \\mathrm{~N} / \\mathrm{C}$ at a point that is $50 \\mathrm{~cm}$ away from the particle. What is the magnitude of the particle's charge?\n\n(A) $27 \\mathrm{pC}$\n(B) $49 \\mathrm{pC}$\n(C) $100 \\mathrm{pC... | H | Physics |
f9c3f2a1fd0546b0ae632bace9882ed1 | [
{
"role": "user",
"content": "The rate of disappearance of $A$ at two temperature for the equilibrium $A \\rightleftharpoons B$ is given by : $- \\displaystyle\\frac { d\\left[ A \\right] }{ dt } = 2\\times { 10 }^{ - 2 }\\left[ A \\right] - 4\\times { 10 }^{ - 3 }\\left[ B \\right]$... | H | Chemistry |
3e3fccf06af146759849ae4bcde1d759 | [
{
"role": "user",
"content": "The temperature of the fireball in a thermonuclear explosion can reach temperatures of approximately $10^7 \\mathrm{~K}$. What value of $\\lambda_{\\max }$ does this correspond to?\n\n(A) 5 $10^{-10} \\mathrm{~m}$\n(B) 2 $10^{-10} \\mathrm{~m}$\n(C) 3 $10^{-10} \\mathrm{~m}$\n(... | C | Physics |
64d6d1cf091641099e293be28395127b | [
{
"role": "user",
"content": "How many electrons, neutrons, and protons are in an atom of 52Cr?\n\n(A) 27 electrons, 27 protons, 24 neutrons\n(B) 28 electrons, 27 protons, 24 neutrons\n(C) 24 electrons, 28 protons, 24 neutrons\n(D) 28 electrons, 28 protons, 24 neutrons\n(E) 27 electrons, 24 protons, 28 neut... | F | Physics |
d4d9dbcebb734c1e9a9bc4485dc0b5f3 | [
{
"role": "user",
"content": "To 1.0 liter of a 1.0M solution of glycine at the iso-electric pH is added 0.3 mole of HCl. What will be the pH of the resultant solution? What would be the pH if 0.3 mole of NaOH were added instead?\n\n(A) 3.2 and 8.9\n(B) 3.0 and 8.3\n(C) 2.5 and 9.5\n(D) 2.0 and 10.0\n(E) 3.... | H | Chemistry |
d3fae7bc912847e19bba154d1dc19349 | [
{
"role": "user",
"content": "Which of the following is/are correct about the critical condition of real gas following Vander Waal's equation of state?\n\n(A) $Z = \\dfrac {1}{8}$ for every real gas at the critical point and all real gases are more compressible than ideal gases.\n(B) Z = \\dfrac {5}{8} for ... | C | Physics |
0d17720089a641d7b42b3edbc33b971f | [
{
"role": "user",
"content": "A solid sphere is rolling purely on a rough horizontal surface (coefficient of kinetic friction $ =\\mu)$ with speed of centre $= u$. It collides inelastically with a smooth vertical wall at a certain moment, the coefficient of restitution being $\\displaystyle \\frac{1}{2}$The... | A | Physics |
206c0bc115bb4ad1ad764e504d990a2f | [
{
"role": "user",
"content": "\"The ovule of a rose is analogous to the capsule of a moss.\" Explain what is wrong with this statement.\n\n(A) The ovule of a rose and the capsule of a moss are identical in function.\n(B) The capsule of a moss contains seeds, while the ovule of a rose contains spores.\n(C) T... | D | Biology |
f408f9cc308545b89d6b3b5147c340ec | [
{
"role": "user",
"content": "A cylindrical piston of mass $M$ slides smoothly inside a long metallic cylinder closed at one end, enclosing a certain mass of gas. The cylinder is kept with its axis horizontal. If the piston is disturbed from its equilibrium position, it oscillates simple harmonically. The p... | E | Physics |
1bb0e76b2f0e4024a2680ab72d1f87a3 | [
{
"role": "user",
"content": "Consider an atom containing one electron and having an atomic number Z. It is observed that light of a wave-length of 0.1 nm will excite this atom from the ground state to infinite ionization. Determine the value of Z.\n\n(A) 10 protons\n(B) 50 protons\n(C) 55 protons\n(D) 20 p... | I | Physics |
de1950516378426e8ffac8edc68cbb86 | [
{
"role": "user",
"content": "In acid solution the bromate ion, BrO3- can react with other substances, resulting in Br2. Balance the half-reaction for bromate ions forming bromine. The balanced half-reaction has\n\n(A) 2 electrons on the left\n(B) 5 electrons on the right\n(C) 10 electrons on the left\n(D) ... | C | Chemistry |
004f75dd5a104f148adcc78b1a1748fa | [
{
"role": "user",
"content": "Two straight long and thin parallel wires are spaced 0.1 m apart and carry a current each. Find the magnetic field at a point which is at a distance of 0.1 m from both wires in the two cases when the currents are in the (a) same and (b) opposite directions (Given= $\\mu_0= 4\\p... | A | Physics |
aaa6ccb7a93943d1a251cf2114a346ca | [
{
"role": "user",
"content": "Suppose the potential energy between an electron and a proton at a distance $r$ is given by $\\dfrac{Ke^2}{3r^3}$. Application of Bohr's theory to hydrogen atom in this case shows that\n\n(A) Energy in the \\( n^{th} \\) orbit is proportional to \\( n^{-3} \\)\n(B) Energy in th... | F | Physics |
f7a4c30d777d433ea68c3788e84678a5 | [
{
"role": "user",
"content": "A nonrelativistic particle with a charge twice that of an electron moves through a uniform magnetic field. The field has a strength of π/4 tesla and is perpendicular to the velocity of the particle. What is the particle's mass if it has a cyclotron frequency of 1,600 hertz?\n\n... | J | Physics |
fd6f9c7e6073476da38fc14fdddb1d6f | [
{
"role": "user",
"content": "The vapour pressure of mixture of $1$ mol volatile component $A(p^o_A = 100 \\,mmHg)$ and $3$ mol of volatile component $B(p^o_B = 60 \\,mmHg)$ is $75 \\,mm$. For such case\n\n(A) There is a slight deviation from Raoult's law, but it is not significant enough to classify as pos... | H | Chemistry |
93baf99c9bf244c08b36bd5ac1daf005 | [
{
"role": "user",
"content": "Through what potential must a proton initially at rest fall so that its de Broglie wavelength is $1.0 \\times 10^{-10} \\mathrm{~m}$ ?\n\n(A) 0.030V\n(B) 0.075V\n(C) 0.120V\n(D) 0.150V\n(E) 0.001V\n(F) 0.050V\n(G) 0.100V\n(H) 0.200V\n(I) 0.082V\n(J) 0.250V\n\nPlease write your ... | I | Physics |
bffa38816b8c4b8fbda1d0b0202e18c0 | [
{
"role": "user",
"content": "If a 1-kg object could be converted entirely into energy, how long could a 100-Wlight bulb be illuminated?A 100-W bulb uses 100 J of energy each second.\n\n(A) 5.5 × 10^7 years\n(B) 3.0 × 10^7 years\n(C) 1.5 × 10^7 years\n(D) 2.0 × 10^8 years\n(E) 9.0 × 10^6 years\n(F) 4.2 × 10... | G | Physics |
466bf30d309e451bb0a8d43e61422645 | [
{
"role": "user",
"content": "The potential energy of a particle of mass $0.1\\ kg$ moving along x-axis, is given by $U=5x(x-4)\\ J$, where $x$ is in meters. It can be concluded that\n\n(A) the period of oscillation of the particle is ${2\\pi/5 s}$\n(B) the particle executes simple harmonic motion\n(C) the ... | G | Physics |
790b06427b054007b473f2e5e3033caa | [
{
"role": "user",
"content": "Hemoglobin, the protein responsible for carrying oxygen from the lungs to the body tissues, contains 0.355 per cent iron. Hydrolysis of 100 g of hemoglobin gives 1.48 g of tryptphan ; calculate the minimum molecular weight of hemoglobin which is consistent with these results.\n... | B | Biology |
a814b6720b1c403b969cae972790e3df | [
{
"role": "user",
"content": "A crystal reflects 70% at the wavelength of its residual rays, and 4% at adjacent wavelengths. How many reflec-tions are necessary in order that the residual ray shall be 100 times as intense as the light of adjacent wave-lengths?\n\n(A) 8 reflections\n(B) 3 reflections\n(C) 10... | D | Physics |
792a3237c3bd462c836e70f0eda8115d | [
{
"role": "user",
"content": "Two events occur at the same place in an inertial reference frame, S, and are separated by a time interval of 3 sec. What is the spatial separation between these two events in an inertial reference frame S' in which the two events are separated by a time interval of 5 sec.?\n\n... | I | Physics |
56bd221799224cd4ab65228978354219 | [
{
"role": "user",
"content": "Consider a straight wire of radius r_0 oriented along the Z-axis carrying a steady current I. Determine the total power entering a unit length of wire.\n\n(A) πI^2r_0^2\n(B) 0.5I/R\n(C) I/R^2\n(D) 2I^2R\n(E) I^2R^2\n(F) I^2/r_0\n(G) 2πI/r_0\n(H) IR^2/π\n(I) I^2R\n(J) I^2/R\n\nP... | I | Physics |
701ce0f9a2c44ae9ab1f9a4a000f3aa5 | [
{
"role": "user",
"content": "The cross section for a 2.0-MeV neutron (a typical energy for a neutron released in fission) being absorbed by a U-238 nucleus and producing fission is 0.68 barn. For a pure U-238 sample of thickness 3.2 cm, what is the probability of a 2.0-MeV neutron producing fission?\n\n(A)... | C | Physics |
9dd6a44e099149c693f3e102ededfba0 | [
{
"role": "user",
"content": "Assuming the ionization potential of sodium is 5.1eVand the electron affinity of chlorine is 3.6eV, calculate the amount of energy required to transfer one electron from an isolated sodium (Na) atom to an isolated chlorine (Cl) atom.\n\n(A) 8.7eV\n(B) 4.7eV\n(C) 1.6eV\n(D) 1.5e... | D | Physics |
00755ab4125b42db94b025748363b185 | [
{
"role": "user",
"content": "What percent of the AB particles are dissociated by water if the freezing point of a(.0100 m) AB solution is -0.0193°C? The freezing point lowering constant of water is (-1.86°C / mole).\n\n(A) 4%\n(B) 5%\n(C) 15%\n(D) 8%\n(E) 12%\n(F) 2%\n(G) 7%\n(H) 10%\n(I) 6%\n(J) 3%\n\nPle... | A | Chemistry |
963860d067b0469490cd6651cfe11dac | [
{
"role": "user",
"content": "Two electrochemical cells were fitted with inert platinum electrodes and connected in series. The first cell contained a solution of a metal nitrate; the second cell, metal sulfate. After operation of the cell for a prescribed period of time, it was observed that 675 mg of the ... | A | Chemistry |
a7e83bed157a4515bc6784b7566532df | [
{
"role": "user",
"content": "Are the daughter nuclei formed during cleavage exactly equivalent , or is there some sort of parceling out of potentialities during cleavage?\n\n(A) Segregation of genetic potentialities with bias toward cellular location\n(B) No segregation of genetic potentialities during cle... | B | Biology |
67cae6e4f6db4a0ba44c1c4210b328f4 | [
{
"role": "user",
"content": "In garden peas, the allele for tall plants (D) is completely dominant to the allele for dwarf plants (d) and the allele for violet flower color (W) is completely dominant to the allele for white flower color (w). In a cross between a tall violet plant, with the genotype DDWw, a... | D | Biology |
76e9463d124c4443baa3c89aa9ffce26 | [
{
"role": "user",
"content": "For a cell reaction of the type T + R^+2 \\leftrightarrows R + T^+2 , calculate the value that E° must have so that the equilibrium concentration of T^+2 is a thousand times the R^+2 concentration.\n\n(A) .078 volt\n(B) .048 volt\n(C) .038 volt\n(D) .108 volt\n(E) .128 volt\n(F... | I | Chemistry |
be1b8123934246c3b05eb598d68ab7eb | [
{
"role": "user",
"content": "Calculate the Q value of the following reaction (^106 _46)Pd + (^1 _0)n \\rightarrow (^106 _45)Rh+ (^1 _1)H + Q (^106 _45)Rh\\rightarrow (^106 _46)Pd + \\beta-+ѵ+ 3.54MeV The product (^106 _45)Rhdecays with a half-life of 30 seconds and 3.54MeV\\beta particles are emitted to th... | B | Physics |
616c19fb396c4f5788096c4f5940a4cc | [
{
"role": "user",
"content": "At a temperature of 300°K it takes 12.6 min for a certain reaction to be 20% complete, and at 340°K the same reaction takes 3.20 min. Calculate the activation energy E_a for the reaction.\n\n(A) 30.80 kJ\n(B) 32.50 kJ\n(C) 31.88 kJ\n(D) 25.00 kJ\n(E) 21.50 kJ\n(F) 27.00 kJ\n(G)... | J | Chemistry |
15720982cf85486ca9ff09f03f4508b6 | [
{
"role": "user",
"content": "Protons of mass 1.67 × 10^-27 kg and moving with a velocity of 2 × 10^7 m \\textbullet s^-1 strike a target of mass1 g and specific heat capacity 0.334 cal \\textbullet g^-1 \\textbullet C deg^-1. The proton stream corresponds to a current of 4.8\\muA. At what rate does the tem... | H | Physics |
718e039fe19f44f8b2679670572b65e1 | [
{
"role": "user",
"content": "Kernel color in wheat is determined by the action of two pairs ofpolygenesthat produce colors varying from dark red to white. If AABB (dark red) andaabb(white) are crossed, (a) What fraction of the F_2 generation can be expected to be like either parent? (b) How many F_2 phenot... | C | Biology |
aa97e8050c2046ca8af65de17ec2acca | [
{
"role": "user",
"content": "A group of mountain climbers set up camp at a 3 km altitude and experience a barometric pressure of 0.69 atm. They discover that pure water boils at 90°C and that it takes 300 minutes of cooking to make a \"three-minute\" egg. What is the ratio of the rate constantk_100°c and k... | G | Physics |
69562595c0db4e989c390cbee10dfe8c | [
{
"role": "user",
"content": "Electricity and magnetism connect to form\n\n(A) radio waves\n(B) energy\n(C) mass\n(D) light\n(E) ultrahigh-frequency sound\n(F) chemical reactions\n(G) low-frequency sound\n(H) heat\n(I) gravity\n(J) nuclear power\n\nPlease write your final answer in the form of \\boxed{A}, \... | D | Physics |
eb80c81b078a4ce08ec6f8f44a94d7ca | [
{
"role": "user",
"content": "The driver of a police car hears an echo of the car's siren from a wall toward which the car is moving with a speed of 3.5 m/s. If the speed of sound is 350 m/s and the frequency of the siren is 600 Hz, the driver hears the echo at a frequency nearest to which of the following?... | A | Physics |
a22b2d3a86574e5db53fc7fc2cba0633 | [
{
"role": "user",
"content": "The cross section for neutrons of energy 10 eV being captured by silver is 17 barns. What is the probability of a neutron being captured as it passes through a layer of silver 2 mm thick?\n\n(A) 0.1\n(B) 0.05\n(C) 0.5\n(D) 0.9\n(E) 0.8\n(F) 0.2\n(G) 0.15\n(H) 0.3\n(I) 0.6\n(J) ... | F | Physics |
192309669fb040848c92cac03cd7e47d | [
{
"role": "user",
"content": "The balance of plant hormones plays a regulatory role in maintaining and breaking bud dormancy. What plays the main role in this process?\n\n(A) ABA and Eth\n(B) CTK and GA\n(C) Aux and ABA\n(D) IAA and CTK\n(E) GA and CK\n(F) TAA and GA\n(G) Eth and TAA\n(H) CTK and Eth\n(I) A... | I | Biology |
8c28b94e5e0147979ba1429db98ff2e6 | [
{
"role": "user",
"content": "The ionization constant for acetic acid is 1.8 × 10^-5 . a) Calculate the concentration of H^+ ions in a 0.10 molar solution of acetic acid. b) Calculate the concentration of H^+ ions in a 0.10 molar solution of acetic acid in which the concentration of acetate ions has been in... | J | Chemistry |
98ddaccc87464f259eadd2689164fc17 | [
{
"role": "user",
"content": "If $125 \\mathrm{~cm}^3$ of hydrogen gas effuses through a small hole in 135 seconds, how long will it take the same volume of oxygen gas to effuse under the same temperature and pressure?\n\n(A) 725 $\\mathrm{s}$\n(B) 190 $\\mathrm{s}$\n(C) 270 $\\mathrm{s}$\n(D) 675 $\\mathrm... | J | Physics |
ed3c6946206b49ca89bd6516eec7d379 | [
{
"role": "user",
"content": "A gene C mutates to c with a frequency of 2 × 10^-6 per generation. There are no other forces acting on these alleles and mating is random. How many generations are needed to increase the frequency of gene c from 2 percent to 3 percent?\n\n(A) 7,500 generations\n(B) 6,200 gener... | J | Biology |
5d78d172782d4a4fb02430fd846c7104 | [
{
"role": "user",
"content": "What is the minimum kinetic energy in MeV of a proton in a medium-sized nucleus having a diameter of 8.0 x 10^-15 m?\n\n(A) 0.08\n(B) 0.08 x 10^-3\n(C) 8.0\n(D) 0.000008\n(E) 80\n(F) 0.005\n(G) 0.5\n(H) 0.008\n(I) 0.8\n(J) 0.0008\n\nPlease write your final answer in the form of... | A | Physics |
4158301178ff470f8bb00b037b0f66e6 | [
{
"role": "user",
"content": "Given that $D_e=4.75 \\mathrm{eV}$ and $R_e=0.741 Å$ for the ground electronic state of $\\mathrm{H}_2$, find $U\\left(R_e\\right)$ for this state.\n\n(A) -26.89 $\\mathrm{eV}$\n(B) -33.21 $\\mathrm{eV}$\n(C) -30.77 $\\mathrm{eV}$\n(D) -35.00 $\\mathrm{eV}$\n(E) -34.12 $\\mathr... | H | Physics |
1202c219af1f4e65995f62a653d5076d | [
{
"role": "user",
"content": "What type of division occurs when the unicellular pollen further develops into a generative cell and a vegetative cell?\n\n(A) Asymmetric Mitosis\n(B) Asymmetric Meiosis\n(C) Asymmetric Nuclear Division\n(D) Symmetric Binary Fission\n(E) Asymmetric Cytokinesis\n(F) Asymmetric B... | A | Biology |
1b4cec9a3f824c1aa7178828205539bf | [
{
"role": "user",
"content": "Anucleusof mass M emits a \\Upsilon ray of energy E_\\Upsilon^\\ding{217} . The nucleuswas initially at rest . What is its recoil energy after the emission?\n\n(A) E_\\Elzpbgam^2/ Mc^2\n(B) \\( E_{\\Upsilon} / 4Mc^2 \\)\n(C) \\( E_{\\Upsilon}^2 / 2M \\)\n(D) E_\\Elzpbgam/ 2Mc^2... | F | Physics |
804b1d6df0734b3e89fdfbfeb82ff225 | [
{
"role": "user",
"content": "A sample of the sugar D-ribose of mass $0.727 \\mathrm{~g}$ was placed in a calorimeter and then ignited in the presence of excess oxygen. The temperature rose by $0.910 \\mathrm{~K}$. In a separate experiment in the same calorimeter, the combustion of $0.825 \\mathrm{~g}$ of b... | D | Chemistry |
ed15653da90f4897ae842e6c0659b2a4 | [
{
"role": "user",
"content": "In intact isolated mitochondria, in the presence of oxidizable substrates, which substance can increase electron transfer and oxygen uptake?\n\n(A) $\\mathrm{FADH_2}$\n(B) Succinate\n(C) Coenzyme Q\n(D) Enzymes of the TCA Cycle\n(E) ADP\n(F) Citrate\n(G) Cytochrome c\n(H) Pyruv... | E | Biology |
39a2421772104e58a9a0c4ad102e796a | [
{
"role": "user",
"content": "To establish the ethogram of the saiga antelope, researchers observed and recorded the behaviors of a group of antelopes one by one at fixed time intervals. What type of sampling method in ethological research does this represent?\n\n(A) Event-based Sampling\n(B) Time-point Sam... | D | Biology |
b2233d3a34854b3bb7ec9efa3a211462 | [
{
"role": "user",
"content": "What are the changes in heart rate, cardiac output, blood pressure, and respiration caused by pressing on the carotid sinus and carotid body of the test rabbit?\n\n(A) Heart rate stabilizes, cardiac output rises, blood pressure increases, and respiration speeds up\n(B) Increase... | C | Biology |
0f29cc392eff4479aa6c36907c28a58e | [
{
"role": "user",
"content": "The number of unsaturated bonds in the fatty acids of the cell membrane lipids: the _____ the number, the lower the solidification temperature, and the stronger the cold resistance.\n\n(A) constant\n(B) limited\n(C) equal\n(D) unchanged\n(E) singular\n(F) minimal\n(G) lesser\n(... | I | Biology |
323c903260e54cb6aba4a353a5c1850d | [
{
"role": "user",
"content": "What is required in the process of developing the megaspore into the embryo sac during the sexual reproduction of angiosperms?\n\n(A) One mitosis produces six nuclei.\n(B) The second meiotic division forms six nuclei.\n(C) Three rounds of meiosis result in the formation of four... | D | Biology |
70677fc62868437eb6f517bd1778d781 | [
{
"role": "user",
"content": "The mean arterial pressure refers to the average value of arterial blood pressure at every moment during one cardiac cycle. So, what should its value be closer to?\n\n(A) The overall blood pressure peak\n(B) Arterial pressure at ventricular systole\n(C) The systolic and diastol... | E | Biology |
6f7f995ae79b4a7898d339bec6f0bcab | [
{
"role": "user",
"content": "Microevolution refers to evolutionary changes at the level of individuals and populations within a species. What is the basic unit of microevolution?\n\n(A) Population\n(B) Individual Genotype\n(C) Cellular Process\n(D) Genetic Mutation\n(E) Genetic Variation\n(F) Specific Ecos... | A | Biology |
b759f06adf114ef5bcce621a15c9520c | [
{
"role": "user",
"content": "Research has found that dibenzocyclooctadiene lignans are considered characteristic chemical components of plants in the genus Schisandra, known for their hepatoprotective effects, antioxidant properties, anti-tumor activities, and anti-HIV activities. According to the Cronquis... | B | Biology |
8b016f79f7e14581b2c9c1c00b3b392a | [
{
"role": "user",
"content": "Calculate the change in entropy for liquid water @ - 5°C and 1atmto ice at - 5°C and 1 atm. Use the following data: C_p for H_2O(s) = 9 cal deg^-1 mole^-1 C_p forH_2O(1) = 18 cal deg^-1 mole^-1 \\DeltaH_fusion@ 0°C and 1atmis1,440 cal/mole\n\n(A) 1.440eu\n(B) 0.333eu\n(C) -1.44... | J | Physics |
ab60956b51574a4fa6475702c88bd045 | [
{
"role": "user",
"content": "Which of the following descriptions about the chemiosmotic theory is correct?\n\n(A) $\\mathrm{H^+}$ is primarily present in the space outside the mitochondria, while $\\mathrm{OH^-}$ is absent near the membrane.\n(B) $\\mathrm{OH^-}$ is actively transported and accumulates out... | H | Biology |
6eec392cb59549aaa64b1569442cbf8e | [
{
"role": "user",
"content": "Experiments show that the retractive force $f$ of polymeric elastomers as a function of tem- perature $T$ and expansion $L$ is approximately given by $f ( T, L )=a T ( L-L_{0} )$ where $a$ and $L_{0}$ are constants.\nUse Maxwell relations to determine the entropy and enthalpy, ... | B | Physics |
f31414ea9e8248e4859c51cd1e8b188b | [
{
"role": "user",
"content": "The island is densely and evenly covered with cormorant nests. What type of behavior ensures the establishment and maintenance of their territories?\n\n(A) Friendly Behavior\n(B) Foraging behavior\n(C) Performative Acts\n(D) Defensive Behavior\n(E) Aggressive Behavior\n(F) Migr... | E | Biology |
c72d7d03ceb547c9ad59761ce8379101 | [
{
"role": "user",
"content": "Primarily distributed along the eastern coast of the Eurasian continent, summers are hot and rainy, while winters are cold with little rainfall. The annual precipitation ranges between 1000 and 1500mm. The forest structure is simple and not very tall, mainly composed of species... | H | Biology |
7c6cb82e89aa454387ea607da9b9792a | [
{
"role": "user",
"content": "What are the main forms of transport for oxygen and carbon dioxide in the blood?\n\n(A) Physical dissolution; carbaminohemoglobin\n(B) Oxyhemoglobin; Plasma glucose\n(C) Dissolved oxygen; Nitrogen bubbles\n(D) Oxyhemoglobin; Carbon monoxide\n(E) Bicarbonate; Water vapor\n(F) Ox... | G | Biology |
93c7c338cddf474b9839ea8fa5fe1424 | [
{
"role": "user",
"content": "The nucleus of a hydrogen atom, a proton, has a magnetic moment. In a magnetic field, the proton has two states of different energy; spin up and spin down. This is the basis of proton NMR. The relative populations can assume be given by the Boltzmann distribution, where the dif... | E | Physics |
29c4d16f22e6419290a0d886d26dfe9c | [
{
"role": "user",
"content": "Newton's rings are seen in transmitted light of 500 nm. The diameter of the 20th bright ring is found to be 4 mm. a) What is the radius of curvature of the lens? b) What is the diameter of the 30th bright ring?\n\n(A) Radius of curvature of the lens is 39 cm and diameter of the... | A | Physics |
2b62cb82c69240e3a5e08b4f0e9eacbb | [
{
"role": "user",
"content": "What is the reason for reduced urine output during excessive sweating?\n\n(A) Plasma crystalloid osmotic pressure decreases, inhibiting antidiuretic hormone secretion.\n(B) Reduced blood volume leads to an increase in glomerular filtration.\n(C) The decrease in plasma crystallo... | D | Biology |
d969325dc67c4e029432e7b13a22075a | [
{
"role": "user",
"content": "What type of ovary does the sunflower's fruit develop from?\n\n(A) With 1 carpel, 1 chamber, and 1 ovule, a superior ovary\n(B) An inferior ovary with 1 carpel, 2 locules, and 1 ovule\n(C) An inferior ovary with 2 carpels, 1 locule, and 1 ovule\n(D) An inferior ovary with 1 car... | C | Biology |
d193a8cbdebc48249d5779e72c3a3866 | [
{
"role": "user",
"content": "Before the germination of barley seeds, the embryo is removed, and the starch within the seed cannot be hydrolyzed. What can be applied to most effectively restore the seed's ability to hydrolyze starch?\n\n(A) Auxins\n(B) Prolamin\n(C) Ethylene\n(D) Photosynthase\n(E) Gibberel... | E | Biology |
7f3074557dc741ecb7d265cfa9581412 | [
{
"role": "user",
"content": "The dynamics of biological communities should encompass at least three aspects: aside from the internal dynamics of the community, what else is involved in the evolution of biological communities on Earth?\n\n(A) Dispersal of Communities\n(B) Habitat Partitioning Mechanisms\n(C... | E | Biology |
00af6b91190246f0bfb99dc073fe6c64 | [
{
"role": "user",
"content": "Calculate the yield, the threshold energy and the project-ile energy for the reaction (^23 _11)Na [(^3 _1)H , ^1n] (^25 _12)Mg with the masses equal to 22.9898, 3.01605, 1.008665 and 24.98584, respectively.\n\n(A) Yield: 9.89MeV, Threshold energy: No meaning, Projectile energy:... | E | Physics |
a385503633f34f78a4b13da5b9b6f84a | [
{
"role": "user",
"content": "The scales of carp and snakes play an important protective role for the body. What is correct regarding the position and origin of these scales?\n\n(A) The scales of both carp and snakes are located within the epidermis and are derived from the dermis.\n(B) The scales of the ca... | H | Biology |
e460e1fe0896454f8ac5a1d3ac7290e5 | [
{
"role": "user",
"content": "In a certain rainforest system, there are four species of rodents with average individual biomasses of 20, 30, 40, and 50 grams, respectively. Under the condition that all other factors remain the same, which species has the highest relative abundance?\n\n(A) A species with a b... | E | Biology |
1a4076490a0b4312bce5984a9530c07c | [
{
"role": "user",
"content": "Two DNA molecules (① and ②) have the same number of base pairs (1000 bp), but their base compositions are different. ① contains 44% G+C, while ② contains 66% G+C. How many T are there in ① and ②, respectively?\n\n(A) 380, 620\n(B) 600, 320\n(C) 520, 360\n(D) 570, 330\n(E) 480, ... | J | Biology |
00dc4b2e33534532832393b9048b1d9b | [
{
"role": "user",
"content": "Arthropods possess an open circulatory system. Which of the following statements accurately describes their blood-filled cavities?\n\n(A) A coelom filled with blood at birth\n(B) A cavity with confined blood and specialized vessels\n(C) An organ-specific compartment enclosed by... | D | Biology |
65fa7ee5fbdd4ebf843c15fed7d4dd3c | [
{
"role": "user",
"content": "A certain type of bird that lives 50 kilometers from the coast arrives at the seaside 50 minutes later each day to forage. What does this belong to?\n\n(A) Feeding Interval\n(B) Irregular.\n(C) Diurnal Pattern\n(D) Migratory Behavior\n(E) Lunar Rhythm\n(F) Seasonal Cycle\n(G) T... | G | Biology |
f8ced03f7dcf42a38da1561a7d1f2d77 | [
{
"role": "user",
"content": "Let us assume for a moment that a protein of mass 50,000 g/mol can freely move in the cell. Approximate the cell as a cubic box\n$1 0 \\; \\mu\\mathrm{m}$ on a side.Now assume that we deuterate all the hydrogens in the protein (replace hydrogens with deuterium atoms). If the pr... | E | Biology |
fc061ce8669647dc8344bc69db30fe96 | [
{
"role": "user",
"content": "In the bacterial growth curve, at which point are the total bacterial count and the viable bacterial count nearly equal?\n\n(A) Grace Period\n(B) Logarithmic phase\n(C) Stable Period\n(D) Juvenile stage\n(E) Exponential decline phase\n(F) Inoculation phase\n(G) Period of Death\... | B | Biology |
5c6356a1ae124f1895e119191b78c6e9 | [
{
"role": "user",
"content": "Which of the following ferns has an aerial stem with a distinct division between nodes and internodes?\n\n(A) Cibotium barometz\n(B) Selaginella\n(C) Floatingfern\n(D) Quillwort\n(E) Clubmoss\n(F) Mangqi\n(G) Scouring Rush\n(H) Maidenhair Fern\n(I) Phoenix Tail Fern\n(J) Stagho... | G | Biology |
6aada904a65f4c7f96132a65399dfa38 | [
{
"role": "user",
"content": "What is the relationship between the quality of vision among the three types of animals: fish, birds, and mammals?\n\n(A) Bird > Fish = Mammal\n(B) Birds > Fish > Mammals\n(C) Fish > Mammals > Birds\n(D) Fish > Birds > Mammals\n(E) Mammals > Fish > Birds\n(F) Fish = Bird > Mamm... | J | Biology |
7d6ad8c52f0f4cc1a24f51744eb9190c | [
{
"role": "user",
"content": "A married couple had a son (named \"OK\"), and little \"OK\" not only is colorblind, but also has an extra sex chromosome compared to other boys: XY. Medical examinations show that \"OK\"'s parents have normal vision and no hereditary or other diseases. How did little \"OK\" ac... | D | Biology |
17034c7c4aa54fdbb3d76cd0847b69ce | [
{
"role": "user",
"content": "After processing for one hour, adding iodine solution will cause the contents of which test tube to turn blue?\n\n(A) After thoroughly mixing rice soup with a certain amount of cooled boiled water, place the test tube in water maintained at 37°C.\n(B) Combine mashed potatoes wi... | A | Biology |
d96ccc23bb9a4b29a3835475a83c756c | [
{
"role": "user",
"content": "Which structure is the source of the rays in the root?\n\n(A) Epidermal Cell Region\n(B) Root Tip Meristematic\n(C) Intercellular Pith Strand\n(D) The original cambium\n(E) Secondary Xylem Origin\n(F) Edges of Protoxylem\n(G) Pericycle Layers Source\n(H) Phloem Ray Diffusion\n(... | I | Biology |
590ac5f2c80f486e83f8478f276dd198 | [
{
"role": "user",
"content": "Where is Mendel's Second Law manifested?\n\n(A) During fertilization stage\n(B) Mitosis\n(C) In the zygote formation phase\n(D) In meiosis and mitosis\n(E) During DNA replication process\n(F) Throughout genetic recombination\n(G) During cytokinesis process\n(H) In the mitotic d... | I | Biology |
c4989fc378654551b8ef93ad99fcf5bb | [
{
"role": "user",
"content": "In corn, the number of double recessive types among the offspring of the AB/ab × AB/ab cross accounts for 16% of all progeny. What is the genetic map distance between these two genes?\n\n(A) 50\n(B) 45\n(C) 30\n(D) 10\n(E) 15\n(F) 20\n(G) 35\n(H) 40\n(I) 60\n(J) 25\n\nPlease wr... | F | Biology |
409d98f7ef544080adedf66f6caac462 | [
{
"role": "user",
"content": "The enzyme that catalyzes peptide bond formation is called peptidyl transferase because it is capable of?\n\n(A) Transfer the growing peptide chain to a new amino acid.\n(B) Transferring amino acids from tRNA to an elongating peptide chain\n(C) Moving the peptide chain directly... | A | Biology |
d8413b42332449ea9ae0ad47482995be | [
{
"role": "user",
"content": "The birth weight of most human newborns is generally stable between 3 to 4 kilograms, and the mortality rates are higher for babies who are either underweight or overweight. What type of natural selection pattern does this result from?\n\n(A) Transitional Selection\n(B) Split S... | I | Biology |
360e51498082401f93f63f5afa21de0a | [
{
"role": "user",
"content": "The absorption of glucose by the human small intestine occurs against the concentration gradient, and its energy source is?\n\n(A) Calcium Pump\n(B) Proton pump\n(C) Active Proton Gradient\n(D) Osmotic Pump\n(E) Glucose Diffusion Process\n(F) Passive Transport Mechanism\n(G) Po... | J | Biology |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.