Description : Why does kinetic energy quadruple if speed doubles?
Last Answer : Work (which is a type of energy transfer) = force xdistance.Look at the formulae for acceleration. The relevantformula in this case (simplified for the case that the initialspeed is zero) is:Distance = (1/ ... also increase by a factor four.Or in general, it will scale with the square of the speed.
Description : For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to Cp n , then what is the value of 'n' for this chemical reaction? (A) 0 (B) 1 (C) 2 (D) 3
Last Answer : (B) 1
Description : For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times. (A) 8 (B) 12 (C) 16 (D) 32
Last Answer : (C) 16
Description : What is the order of chemical reaction as shown in the bellow figure, if it is found that the reaction rate doubles on doubling the concentration of B and also the reaction rate doubles when the concentrations of both A & B ... the concentrations of both B & C were doubled? (A) 1 (B) 2 (C) 3 (D) 4
Last Answer : (B) 2
Description : The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CA n , then what is the value of n for this reaction? (A) 0 (B) 0.5 (C) 1 (D) 2
Last Answer : (C) 1
Description : The increase in the rate of reaction with temperature is due to (A) Increase in the number of effective collisions (B) Decrease in activation energy (C) Increase in the average kinetic energy of the reacting molecules (D) None of these
Last Answer : (B) Decrease in activation energy
Description : A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (ke ff) is given by (A) ke ff = k + kg ( ... + kg )/2 (C) ke ff = (kkg ) 1/2 (D) 1/ke ff = 1/k + 1/kg
Last Answer : (D) 1/ke ff = 1/k + 1/kg
Description : Which of the following statements is not one of the three basic assumptions of the kinetic theory? w) Matter is composed of very tiny particles. x) The particles of matter are in constant motion. y) The particles of matter lose energy in collisions.
Last Answer : ANSWER: Y -- THE PARTICLES OF MATTER LOSE ENERGY IN COLLOSIONS
Description : The 1936 Nobel Prize in chemistry was awarded to Peter J.W. Debye for his studies of: w) kinetic energy of colliding particles x) electron configuration y) dipole moments z) conformations of cyclohexane
Last Answer : ANSWER: Y -- DIPOLE MOMENTS
Description : Select the incorrect statement. Effective angle of shearing resistance (A) Increases as the size of particles increases (B) Increases as the soil gradation improves (C) Is limited to a maximum value of 45° (D) Is rarely more than 30° for fine grained soil
Last Answer : (C) Is limited to a maximum value of 45°
Description : Taking the values of atomic masses from the tables, find the maximum kinetic energy of beta-particles emitted by `Be^(10)` nuclei formed directly in t
Last Answer : Taking the values of atomic masses from the tables, find the maximum kinetic energy of beta- ... )` nuclei formed directly in the ground state.
Description : When Increasing the concentration and increasing the temp both increase the reaction rates based on which physical phenomenon?
Last Answer : The kinetic energy of the reactants. By increasing the concentration, there are more reactant particles available for the reaction, and increasing the temperature increases the kinetic energy so the reactants come in contact more often, and the reaction rate increases.
Description : Which of the statements listed below about bleeding disorders is/are correct? A. Acquired bleeding disorders are more common than congenital defects. B. Deficiencies of vitamin K decrease production ... disorder. D. Von Willebrand's disease is a very uncommon congenital bleeding disorder.
Last Answer : Answer: AB DISCUSSION: Acquired bleeding disorders are significantly more common than congenital bleeding defects. Vitamin K deficiency may be related to malnutrition or competitive inhibition ... a relatively common disorder of bleeding and is generally undetectable by routine screening methods
Description : What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction? (A) 0 (B) 1 (C) 2 (D) 3
Last Answer : (A) 0
Description : What increases the kinetic energy of the particles that make up a bowl of soup?
Last Answer : Hshsjdh
Description : Why do particles of objects have both kinetic and potential energy?
Last Answer : Particles have both potential and 'kinetic' energy because theenergy is a quaternion consisting of a scalar Es and a vector Ev, E= Es + Ev. The 'kinetic' energy is a vector energy mcV. ... is clearly avector energy but is precluded from being energy because of thedefinition of energy as a scalar.
Description : ________ energy is the total kinetic and potential energy of the particles in an object.?
Last Answer : In microscopic particles it's called internal energy. In macroscopic particles it's called thermodynamic energy.
Description : What would happen in a collision between two particles if there was insufficient kinetic energy and improper geometric orientation?
Last Answer : The particles would rebound and there would be no reaction. The particles would keep bouncing off each other until they eventually react, therefore the rate would be slow.
Description : The following particles move with same kinetic energy. Which of them has maximum momentum? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle
Last Answer : (4) Alpha Particle Explanation: The formula for kinetic energy in terms of momentum for fundamental particles is basically just a quantized version of the classical formula, KE=(P^2)/2m, where KE is kinetic energy, p is momentum and m is the particle’s mass.
Description : The temperature of a gas measures the: w) number of calories of heat present x) average kinetic energy of the particles in the gas y) exact number of particles in the gas z) potential energy of the gas
Last Answer : ANSWER: X -- AVERAGE KINETIC ENERGY OF THE PARTICLES IN THE GAS
Description : Which of the following statements is TRUE about an ELASTIC collision between two particles? Is it true that: w) neither particle loses any of its kinetic energy x) neither particle loses any of ... that lost by the other z) the total kinetic energy before and after the collision remains constant
Last Answer : ANSWER: Z -- THE TOTAL KINETIC ENERGY BEFORE AND AFTER THE COLLISION RE
Description : The following particles move with same kinetic energy. Which of them has maximum momentum ? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle
Last Answer : Alpha Particle
Description : A perfect gas has a value of R= 319.2 J/ kf.K and k= 1.26. If 120 kJ are added to 2.27 kf\g of this gas at constant pressure when the initial temp is 32.2°C? Find T2. a. 339.4 K b. 449.4 K c. 559.4K d. 669.4K formula: cp = kR/ k-1 Q= mcp(T2-T1)
Last Answer : 339.4 K
Description : Which of the following is TRUE of a sample of gas at a constant temperature when the pressure is doubled? w)the volume doubles x)the volume halves y)the volume remains the same
Last Answer : ANSWER: X -- THE VOLUME HALVES
Description : If the length of the shank is doubled, then strain energy absorbed by shank a) Doubles b) Remains same c) Increases 4 time d) Become half
Last Answer : a) Doubles
Description : The combined mass of car and passengers travelling at 72 km/hr is 1500 kg. Find the kinetic energy of this combined mass. (Formula: K =mv2 / 2k ) a. 300 kJ b. 200 kJ c. 500 kJ d. None of the above
Last Answer : 300 kJ
Description : The rate of change of linear momentum of a body falling freely under gravity is equal to it's (1) Kinetic Energy (2) Weight (3) Potential Energy (4) Impulse
Last Answer : (2) Weight Explanation: Rate of change of impulse equals the force. In case of freely falling body the only force is the weight.
Description : Which of the following statements is correct regarding the internal rate of return (IRR) method? A. Each project has a unique internal rate of return. B. As long as you are not dealing with ... of return is rarely used by firms today because of the ease at which net present value is calculated
Last Answer : D. The internal rate of return is rarely used by firms today because of the ease at which net present value is calculated.
Description : Which of the following statements is correct regarding the internal rate of return (IRR) method? A. Each project has a unique internal rate of return. B. As long as you are not dealing with ... of return is rarely used by firms today because of the ease at which net present value is calculated.
Description : Which of the following statements is correct regarding the internal rate of return (IRR) method? A. Each project has a unique internal rate of return B. As long as you are not dealing with ... of return is rarely used by firms today because of the ease at which net present value is calculated
Description : Four particles `alpha`-particle, deuteron and electron and a `CI^(-)` ion enter in a transverse magnetic field perpendicular to it with same kinetic e
Last Answer : Four particles `alpha`-particle, deuteron and electron and a `CI^(-)` ion enter in a ... shown in figure. Now match the following two columns.
Description : A man has 3 wife's, each one has 3 houses, in one of houses for every wife his mother in law lives. He goes to first house with money, mother doubles it, he leaves half, he goes to second wife, ... with no money. How much money did he have? 2 wife are sister and they have a same mother? -Riddles
Last Answer : This answer was deleted by moderators
Description : Which of the following statements is TRUE for an ideal gas, but not for a real gas? A. PV = nRT B. An increase in temperature causes an increase in the kinetic energy of the gas C. The ... same as the volume of the gas as a whole D. No attractive forces exists between the molecule of a gas
Last Answer : PV = nRT
Description : Pick out the wrong statement. (A) The integral method of analysing kinetic data is used when the data is scattered (B) The differential method of analysing kinetic data requires more accurate ... less than one for identical feed composition, flow rate, conversion and for all positive reaction orders
Last Answer : (C) When the reaction rate is independent of temperature, the reaction is said to be of zero order
Description : I am getting unemployment, if I can get freelance work (which will temp. decrease my weekly check) will that increase the length of time I can receive it?
Last Answer : Yes. This just happened to us (different state, but these rules are the same). There is an amount you have “banked,” if you will. When you work and your benefit is reduced, your still have the balance available. So when you run out of work, and you can reopen your claim.
Description : Why does an excess of carbon dioxide increase the temp of earth?
Last Answer : Carbon dioxide (and other gases) creates a "blanket" around theearth trapping heat in the atmosphere. If these "greenhouse" gaseswere not there some of the heat would escape from the earth'satmosphere ... dioxide most ofthis infrared is reflected back down to the surface of the earth,keeping it hot.
Description : The resistivity of ..... decreases with the increase in temp. a. gold b. silver c. copper d. silicon
Last Answer : d. silicon
Description : The enthalpy and entropy change for the reaction, `Br_(2)(l)+Cl_(2)(g)rarr2BrCl(g)` are `30KJmol^(-1)` and `105JK^(-1)mol^(-1)` respectively. The temp
Last Answer : The enthalpy and entropy change for the reaction, `Br_(2)(l)+Cl_(2)(g)rarr2BrCl(g)` are `30KJmol^(-1)` and ` ... 285.7 K B. 273 K C. 450 K D. 300 K
Description : How does temp affect the rate of photosynthesis?
Last Answer : Need answer
Description : Which of the following statement is false? a.The potential energy of a particle has the form Ep = k2x. The force acting on the particle is constant (k is a constant) b.The linear velocity of ... zag path while ascending a steep hill e.The density of milk decreases when cream is taken out of milk
Last Answer : e. The density of milk decreases when cream is taken out of milk
Description : An increase in which of the following results in a decrease in the rate of the chemical reaction? (a) temperature (b) concentration (c) collision frequency (d) energy of activation
Last Answer : energy of activation
Description : Which of the following is incorrect about heterogeneous catalysis? a. The most effective catalysts are those which have small surface area b. Seperation of catlyst is easy c. Increase in the rate of reaction is due to decrease in the activation energy d. It is based upon the phenomenon of adsorption
Last Answer : a. The most effective catalysts are those which have small surface area
Description : Which one of the following statements regarding a catalyst is not correct? A An enzyme is a catalyst that only binds certain substrates. B An enzyme is a protein that is a highly ... increasing the activation energy. D Catalysts do not alter the equilibrium constant for a chemical reaction.
Last Answer : C Catalysts increase the rate of a reaction by altering the mechanism, thereby increasing the activation energy.
Description : 25. In a reaction, A + B Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled, rate law for the reaction can be ... Rate = k[A] [B]2 (3) Rate = k[A]2 [B]2 (4) Rate = k[A] [B]
Last Answer : Rate = k[A]2 [B] (
Description : Is there a wall in your house that doubles as a note-pad?
Last Answer : I use my hand.
Description : Is it true that using marijuana doubles the effective dose of all your medications?
Last Answer : No.
Description : Why wouldn't a pyramid scheme where the price doubles every year work?
Last Answer : Ehh thought about it enough figured out why it would eventually fail.
Description : Lily is a lilypad in a small pond. Lilly doubles her size each day, On the 20th day she covers the whole pond. On what day was Lily half the size of the pond? -Riddles
Last Answer : Day 19, it's not 10 because on day 20 she doubled from day 19, so 19 must be half the size of the pond.
Description : In how many ways can a mixed doubles game be arranged from amongst 8 married couples if no husband and wife play in the same game? -Maths 9th
Last Answer : For mixed doubles, we have 2 men and 2 women. 2 men out of 9 can be selected in 9C8 ways Out of 9 women, 2 will be there wife 30 only 7 are remaining for selecting 2 Now out of them 2 possible combinations can be made. So, ... =3024 Hence the answer is 3024.