Description : If the total kinetic energy and momentum of a system becomes zero after collision, then the collision is A. elastic B. inelastic C. conserved D. not conserved
Last Answer : inelastic
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 : In a collision, which of the following four quantities is always conserved? w) momentum x) kinetic energy y) torque z) moment of inertia
Last Answer : ANSWER: W -- MOMENTUM
Description : In any collision, which of the following is conserved: w) kinetic energy x) velocity y) momentum z) potential energy
Last Answer : ANSWER: Y -- MOMENTUM
Description : In elastic collisions, A. only the total momentum of the colliding objects is conserved. B. only the total kinetic energy is conserved. C. both of the momentum and total kinetic energy ... D. neither momentum of the colliding bodies nor the total kinetic energy are recoverable.
Last Answer : both of the momentum and total kinetic energy are conserved.
Description : In a perfectly elastic collision, the relative speed of approach and relative speed of separation are A. equal B. in equal C. zero D. infinite
Last Answer : equal
Description : In an inelastic collision, state which of the following statements is true: (a) Momentum is conserved and kinetic energy is conserved. (b) Momentum is not conserved and kinetic energy is conserved ... conserved and kinetic energy is not conserved. (d) Momentum is kinetic energy are not conserved.
Last Answer : Ans:(c)
Description : Define coefficient of restitution and obtain its value for an elastic collision and a perfectly inelastic collision.
Last Answer : Define coefficient of restitution and obtain its value for an elastic collision and a perfectly inelastic collision.
Description : Momentum of two objects moving with same speed but in opposite direction upon collision is A. increased B. decreased C. is zero D. is infinite
Last Answer : is zero
Description : An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of ... conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.
Last Answer : ANSWER: Y -- THE SKATER DOES WORK WHEN PULLING IN HER ARMS
Description : The torque acting on a system is zero. Which of the following will be conserved? a.Angular velocity b.Linear momentum c.107 dynes d.Angular momentum e.Moment of inertia
Last Answer : d. Angular momentum
Description : In an elastic collision, the RELATIVE velocities of separation of the two bodies after impact compared with the relative velocity of approach before impact is: w) always greater x) always smaller y) always the same z) first greater, then smaller
Last Answer : ANSWER: Y -- ALWAYS THE SAME
Description : In a perfectly inelastic collision, kinetic energy A. totally disappears B. is increased C. is decreased D. is unchanged
Last Answer : totally disappears
Description : An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: w) momentum but not energy x) neither momentum nor energy y) energy but not momentum z) both momentum and energy
Last Answer : ANSWER: Z -- BOTH MOMENTUM AND ENERGY
Description : A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes
Last Answer : c. 5 m/s
Description : In an elastic collision between disks A and B of equal mass but unequal radii, A moves along the x-axis and B is stationary before impact. Which of th
Last Answer : In an elastic collision between disks A and B of equal mass but unequal radii, A moves along the x- ... @) and 60^(@)` with the x-axis respectively
Description : During SHM which of the following is conserved? a.Kinetic energy b.Potential energy c.Total energy d.Momentum e.All of the above
Last Answer : d. Momentum
Description : A moving bullet hits a solid target resting on a frictionless surface and gets embedded in it. What is conserved in this process? (a) Both momentum and kinetic energy (b) Kinetic energy alone (c) Momentum alone (d) Neither momentum nor kinetic energy
Description : Which one of the following quantities is conserved in pair production? a) Energy b) Charge c) Linear momentum d) All
Last Answer : d) All
Description : A firecracker is placed in the middle of a cluster of stationary billiard balls. The firecracker-billiard ball system sits on a frictionless surface. As the firecracker explodes, the balls scatter. What is the momentum ... to the combined speed of the balls y) equal to the mass of the balls z) zero
Last Answer : ANSWER: Z -- ZERO
Description : For perfectly elastic bodies, the value of the coefficient of restitution is a.1 b.0.372 c.0.5 d.Zero e.Any value between 0 and 1
Last Answer : a. 1
Description : For perfectly elastic bodies the value of the coefficient of restitution is a.0.707 b.0.5 c.1 d.0.25 e.Zero
Last Answer : a. 0.707
Description : In a closed system the momentum before a collision the momentum after a collision.?
Last Answer : The total momentum before the collision is the same as the totalmomentum after the collision. This is known as "conservation ofmomentum".
Description : How does the momentum of two objects before a collision compare with the momentum after the collision?
Last Answer : conservation of momentum
Description : What is the condition for the total momentum of a system to be conserved?
Last Answer : Need answer
Description : What is the total momentum of the system before collision If two 0.5 kg balls approach each other with the same speed of 1.0 ms?
Last Answer : Momentum is mass times velocity. But in this case, you don'teven need to calculate that: If I understand correctly, the ballshave the same mass, the same speed, and they move exactly inopposite directions - so ... other words, if oneball has a momentum of +M, the other one will have a momentum of-M.
Description : "At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero". This follows from the (A) Third law of thermodynamics (B) Second law of thermodynamics (C) Nernst heat theorem (D) Maxwell's relations
Last Answer : (A) Third law of thermodynamics
Description : In the equation of a nuclear reaction, all but one of the following quantities are equal to each other on both sides of the equation. Which quantity is NOT conserved: w) the net electric charge x) the total mass-energy y) the number of protons z) the number of nucleons
Last Answer : ANSWER: Y -- THE NUMBER OF PROTONS
Description : In an isolated system two cars each with a mass of 1000 kg collide car 1 is initially at rest while car 2was moving at10ms what is the magnitude of their combined momentum after the collision?
Last Answer : What is the answer ?
Description : In an isolated system two cars each with a mass of 1500 kg collide car 1 is initially at rest while car 2 was moving at 5ms. What is their combined momentum after collision?
Description : Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at (A) High vacuum (B) Zero pressure (C) 0°K (D) Earth's centre
Last Answer : (B) Zero pressure
Description : Absolute zero pressure will occur (a) at sea level (b) at the center of the earth (c) when molecular momentum of the system becomes zero (d) under vacuum conditions (e) at a temperature of – 273 °K
Last Answer : Answer : c
Description : Two cars collide head-on. They stop at the point of collision. Both cars must have one of the following. Do they have w) equal masses x) equal but opposite velocities before the collision y) equal but opposite momenta before the collision
Last Answer : ANSWER: Y -- EQUAL BUT OPPOSITE MOMENTA BEFORE THE COLLISION
Description : What is meant by Elastic Collision?
Last Answer : When gas molecules collide with each other and the total energy doesn’t increase or decrease after the collision, then this type of collision will be called as elastic collision.
Description : Economic rent does not arise when the supply of a factor unit is - (1) Perfectly inelastic (2) Perfectly elastic (3) Relatively elastic (4) Relatively inelastic
Last Answer : (2) Perfectly elastic Explanation: Economic rent in the sense of surplus over transfer earnings arise when the supply of the factor units is less than perfectly elastic or not perfectly elastic. When ... , at a given price or remuneration, the entrepreneur can engage any number of factor units.
Description : The demand for necessities is - (1) elastic (2) perfectly inelastic (3) inelastic (4) perfectly elastic
Last Answer : (2) perfectly inelastic Explanation: Inelastic demand means that if the price changes, the quantity demanded will not change much. The more necessary a good is, the lower the elasticity, as people ... it no matter the price. Necessities such as water are likely to have perfectly inelastic demand.
Description : If the change in demand for a commodity is at a faster rate than change in the price of the commodity, the demand is - (1) perfectly inelastic (2) elastic (3) perfectly elastic (4) inelastic
Last Answer : (3) perfectly elastic Explanation: If quantity demanded changes by a very large percentage as a result of a tiny percentage change in price, then the demand is said to be perfectly elastic ... in this extreme case would be undefined but it approaches negative infinity as demand becomes more elastic.
Description : Elasticity (e) expressed by the formula 1 > e > 0 is - (1) Perfectly elastic (2) Relatively elastic (3) Perfectly inelastic (4) Relatively inelastic
Last Answer : (4) Relatively inelastic Explanation: Elasticity (e) expressed by the formula 1 > e > 0 is relatively inelastic. Elasticity is responsiveness of one variable to a change in another, when other conditions are held constant.
Description : A horizontal demand curve is - (1) relatively elastic (2) perfectly inelastic (3) perfectly elastic (4) of unitary elasticity
Last Answer : (3) perfectly elastic Explanation: The demand curve facing a perfectly competitive firm is flat or horizontal. This is because all firms in perfect competition are by definition selling an identical (homogeneous) ... of the curve is zero, it is impossible for the price to change in the market.
Description : Any factor of production can earn economic-rent, when its supply will be - (1) Perfectly elastic (2) Perfectly inelastic (3) Elastic in nature (4) All of the above
Last Answer : (2) Perfectly inelastic Explanation: Economic rent is the revenue that can be earned from the land or other natural resource for which there is a fixed supply - as economists like to say, the supply ... inelastic, the amount of its supply does not depend on any income that the resource can produce.
Description : )When percentage change in demand for a commodity is less than percentage change in its price, then demand is said to be - (1) Highly elastic (2) Inelastic (3) Relatively elastic (4) Perfectly inelastic
Last Answer : (2) Inelastic Explanation: When the percentage change in quantity demanded is less than the percentage change in price, then the demand for the commodity is said to be inelastic. Price elasticity of demand refers to the degree of responsiveness of quantity demanded to change in price.
Description : The demand curve facing a perfectly competitive firm is - (1) downward sloping (2) perfectly inelastic (3) a concave curve (4) perfectly elastic
Last Answer : (4) perfectly elastic Explanation: A perfectly competitive industry is comprised of a. large number of relatively small firms that sell identical products. Each perfectly competitive firm is so small ... at the going market price. This translates into a horizontal or perfectly elastic demand curve.
Description : The tendency of a deformed solid to regain its actual proportions instantly upon unloading known as ______________ a) Perfectly elastic b) Delayed elasticity c) Inelastic effect d) Plasticity
Last Answer : a) Perfectly elastic
Description : If the demand curve confronting an individual firm is perfectly elastic, then firm is A.Price taker B.Adjust output C.Adjust price D.All of these Answer Repor
Last Answer : A.Price taker
Description : A material is said to be perfectly elastic if (A) It regains its original shape on removal of the load (B) It regains its original shape partially on removal of the load (C) It does not regain its original shape at all (D) None of these
Last Answer : (A) It regains its original shape on removal of the load
Description : Kinetic theory of gases assumes that the collisions between the molecules are (a) perfectly elastic (b) perfectly inelastic (c) partly elastic (d) partly inelastic (e) partly elastic and partly inelastic.
Last Answer : Answer : a
Description : 48. A perfectly elastic body (a) Can move freely (b) Has perfectly smooth surface (c) Is not deformed by any external surface (d) Recovers its original size and shape when the deforming force is removed.
Last Answer : d) Recovers its original size and shape when the deforming force is removed.
Description : The demand curve of a Monopoly firm is – (a) Same that of a firm in a perfect competition ; (b) Same as that of the total market demand; (c) Non-exist ; (d) Perfectly elastic
Last Answer : (b) Same as that of the total market demand;