totally disappears
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 : During an INELASTIC collision, the colliding bodies w) lose kinetic energy x) keep the same amount of kinetic energy y) gains kinetic energy z) first lose, then gain kinetic energy
Last Answer : ANSWER: W -- LOSE KINETIC ENERGY
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 : 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 : 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 : 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 : In a perfectly elastic collision, momentum and energy are A. not conserved B. conserved C. becomes zero after collision D. equal before collision
Last Answer : 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 : 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 : By overheating the nutritional value of cereal proteins is (A) Increased (B) Decreased (C) Unchanged (D) None of these
Last Answer : Answer : B
Description : When a lead-acid battery begins gassing freely while receiving a normal charge, the charging current should _____________. A. be increased B. remain unchanged C. be decreased D. shut off
Last Answer : Answer: C
Description : When a lead-acid battery begins gassing freely while receiving a normal charge, the charging current should be _____________. A. increased B. shut off C. decreased D. unchanged
Description : If the length of an antenna is changed from 2.5 meters to 2.8 meters, its resonant frequency will A. increase B. depend on the velocity factor so the resonant frequency can either be increased or decreased C. will be unchanged D. decrease
Last Answer : D. decrease
Description : For a symmetrical two hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust (A) Is increased (B) Is decreased (C) Remains unchanged (D) Becomes zero
Last Answer : (B) Is decreased
Description : For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust (A) Is increased (B) Is decreased (C) Remains unchanged (D) Becomes zero
Last Answer : (C) Remains unchanged
Description : If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge (A) Is ... by PZ/e (B) Is increased by Pe/Z (C) Is decreased by Pe/Z (D) Remains unchanged
Last Answer : Answer: Option C
Description : In a ferromagnetic material the state of flux density is as follows when external magnetic field is applied to it. (A) Increased (B) Decreased (C) Remains unchanged (D) Becomes zero
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 : Perfectly inelastic demand is equal to : (1) One (2) Infinite (3) Zero (4) Greater than one
Last Answer : (3) Zero Explanation: Price Elasticity of Demand is a measure of the relationship between a change in the quantity demanded of a particular good and a change in its price. It measures the responsiveness of ... to 0, demand is perfectly inelastic (i.e., demand does not change when price changes).
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 elasticity of demand is perfectly inelastic, then burden of tax will be on (a) Buyer (b) Seller (c) on both (a) and (b) (d) More on seller
Last Answer : (a) Buyer
Description : Very short period is the market condition where the supply remain perfectly (a) Elastic ; (b) Inelastic ; (c) Unity elastic ; (d) Elasticity less than 1
Last Answer : (b) Inelastic ;
Description : If the consumption of a product can be postponed for the time being (a) The demand for the product will be inelastic (b) The demand for the product will be relatively elastic (c) The demand for the product will be perfectly elastic (d) The demand for the product will be perfectly inelastic
Last Answer : (b) The demand for the product will be relatively elastic
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 : perfectly elastic
Description : Perfectly inelastic demand is equal to : (1) One (2)Infinite (3) Zero (4)Greater than one
Last Answer : Zero
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 : Perfectly inelastic
Description : The demand for necessities is (1) elastic (2) perfectly inelastic (3) inelastic (4) perfectly elastic
Last Answer : perfectly inelastic
Description : Elasticity (e) expressed by the formula l > e > 0 is (1) Perfectly elastic (2) Relatively elastic (3) Perfectly inelastic (4) Relatively inelastic
Last Answer : Relatively inelastic
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 : Inelastic
Description : A horizontal demand curve is (1) ralatively elastic (2) perfectly inelastic (3) perfectly elastic (4) of unitary elasticity
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 : Perfectly elastic
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) perlectly elastic (4) inelastic
Last Answer : perlectly elastic
Description : Pick out the wrong statement: (A) With change in temperature, the radiant energy emitted by a black body remains unchanged (B) Absorptivity of a body approaches unity in case of diffuse reflection (C) Absorptivity of ... unity (D) Value of Stefan-Boltzmann constant is 4.876 10 -8 KCal/m2 .hr.°K4
Last Answer : (A) With change in temperature, the radiant energy emitted by a black body remains unchanged
Description : The minimum kinetic energy of a ground state hydrogen atom required to have head-on collision with another ground state hydrogen atom but at rest to p
Last Answer : The minimum kinetic energy of a ground state hydrogen atom required to have head-on collision with another ... at rest to produce a photon is given by
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 : In the impact problems the following conditions must always be satisfied a.The total kinetic energy remains unchanged b.The total linear momentum remains unchanged c.The magnitude of the total linear ... is reduced by a factor proportional to the coefficient of restitution e.None of the above
Last Answer : b. The total linear momentum remains unchanged
Description : If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by – (1) 2 times (2) 4 times (3) 8 times (4) 16 times
Last Answer : (2) 4 times
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 : If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by (1) 2 times (2) 4 times (3) 8 times (4) 16 times
Last Answer : 4 times
Description : If the temperature inside a room is increased, the relative humidity will ______? (1) increase (2) decrease (3) remain unchanged (4) none of these
Last Answer : (2) decrease Explanation: This is because temperatures in the home can be much different than the temperature outside. This is because of that important relationship between temperature and how much maximum moisture can be in the air.
Description : At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas? w) 10,000 milliliters x) 400 milliliters y) 1,000 milliliters z) 4,000 milliliters
Last Answer : ANSWER: X -- 400 MILLILITERS