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 : 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 : 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 : In the mass spectrograph, two positively charged ions having the same velocity pass through a slit and enter a uniform magnetic field at right angles to their initial velocities. The ions will NOT be ... charges and their masses are equal z) the ratios of their charges to their masses are equal
Last Answer : ANSWER: Z -- THE RATIOS OF THEIR CHARGES TO THEIR MASSES ARE EQUAL
Description : Plastic collosion of two bodies of equal mass results in a common velocity after impact which is a.Sum of their initial velocities b.Difference of their initial velocities c.Average of their initial velocities d.Independent of their initial velocities e.None of the above
Last Answer : e. None of the above
Description : A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? Will it be: w) the same x) 2 times y) 4 times z) 8 times
Last Answer : ANSWER: X -- 2 TIMES
Description : According to the theory of relativity, people who travel at relativistic velocities and then return home will be: w) shorter than if they had not made the trip. x) taller than if they had not made the trip. y) younger than if they had not made the trip. z) older than if they had not made the trip.
Last Answer : ANSWER: Y -- YOUNGER THAN IF THEY HAD NOT MADE THE TRIP.
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 : Compared to Chlorine, Bromine has: w) smaller atomic size x) higher density y) lower boiling point z) greater number of outer electrons
Last Answer : ANSWER: X -- HIGHER DENSITY
Description : Ten coulombs of positive charge are placed on an irregularly-shaped, solid piece of copper. Once the charge has stopped moving, the electric field inside the copper is: w) zero x) changes as one ... squared y) becomes smaller as you approach the center z) becomes larger as you approach the center
Last Answer : ANSWER: W -- ZERO
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 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 : The index of refraction can be considered: w) a ratio of material thickness between substances x) a ratio of velocities of light in different materials y) a ratio of mass between materials z) to have the units of photons
Last Answer : ANSWER: X -- A RATIO OF VELOCITIES OF LIGHT OF DIFFERENT MATERIALS
Description : When the image formed by a convex mirror is compared to its object, the image is usually: w) erect and smaller x) inverted and imaginary y) real and inverted z) real and erect
Last Answer : ANSWER: W -- ERECT AND SMALLER
Description : A space ship traveling toward Mars at 0.6 times the speed of light c shoots an ELECTRON beam at Mars. If the electrons travel at 0.6 c RELATIVE TO THE SPACE SHIP, at what speed do the electrons impact the surface of Mars? w) 0.6 c x) 0.88 c y) 1.2 c z) 1.34 c
Last Answer : ANSWER: X -- 0.88 c
Description : The statement, "In regions where fluid velocity is smaller, the pressure is higher, and vice versa", is known as the principle of: w) Pascal x) Bernoulli y) Torricelli z) Archimedes
Last Answer : ANSWER: X -- BERNOULLI
Description : Two hockey pucks, of unequal mass and connected by a spring of negligible mass, rest on a horizontal frictionless surface. The spring is released, and the pucks move apart. The center of mass of ... the direction of the greater mass y) remain stationary z) move in the direction of the smaller mass
Last Answer : ANSWER: Y -- REMAIN STATIONARY
Description : The collision between a photon and a free electron was first explained by which of the following scientists? w) Einstein x) Heisenberg y) Compton z) Bohr
Last Answer : ANSWER: Y -- COMPTON
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 : If two bodies one light and one heavy have equal kinetic energies, which one has a greater momentum? a.Momentum depends on velocities b.Heavy body c.Both have equal momentum d.Nothing can be concluded on the basis of information provided e.Light body
Last Answer : b. Heavy body
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 : 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 : Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles ... (A) Drag on particles (B) Drag on column walls (C) Bed height (D) Bed voidage
Last Answer : (C) Bed height
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 : A beam of light is incident on a perfectly smooth body of water. The angle that the REFLECTED ray makes with the normal is: w) greater than x) smaller than y) the same as the angle the incident ray makes with the normal.
Last Answer : ANSWER: Y -- THE SAME AS
Description : If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force: w) double x) one half y) remain the same z) one quarter
Last Answer : ANSWER: Z -- ONE QUARTER
Description : A car and lorry are both moving with equal kinetic energy. If equal breaking force is applied on both, then before coming to rest the (a) Car will cover a greater distance (b) Lorry ... will cover the same distance (d) The distance covered by them will depend only on their respective velocities
Last Answer : Ans:(c)
Description : An electron and a proton are moving at the same speed in circular paths in the same uniform magnetic field. The radius of the path of the proton is one of the following. Is this radius: w) the same ... of the electron y) a little larger than that of the electron z) smaller than that of the electron
Last Answer : ANSWER: X -- ABOUT 2000 TIMES LARGER THAN THAT OF THE ELECTRON
Description : A thin double-concave lens produces images which are: w) larger than the object x) smaller than the object y) the same size as the object z) one cannot tell from this information
Last Answer : ANSWER: X -- SMALLER THAN THE OBJECT
Description : An object in equilibrium always has zero: w) velocity x) momentum y) mass z) acceleration.
Last Answer : ANSWER: Z -- ACCELERATION
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 : After a projectile is fired horizontally near the earth's surface, the horizontal component of its velocity, neglecting any air resistance: w) increases steadily x) decreases steadily y) first decreases, then increases z) remains constant
Last Answer : ANSWER: Z -- REMAINS CONSTANT
Description : The splitting of an atomic nucleus is called: w) fission x) fusion y) cleavage z) separation
Last Answer : ANSWER: W -- FISSION
Description : For a parallel-plate capacitor with plate area "A" and plate separation "d", the capacitance is proportional to which of the following? w) A divided by d squared x) A times d y) A divided by d z) d divided by A
Last Answer : ANSWER: Y -- A DIVIDED BY D
Description : The gravitational potential energy between two bodies is inversely proportional to: w) the cube of the distance x) the first power of the distance y) the square of the distance z) it has no relation to distance
Last Answer : ANSWER: X -- THE FIRST POWER OF THE DISTANCE
Description : Two bodies of equal mass are moving in circular paths at equal speed. The first body moves in a circle whose radius is twice as great as that of the second. The ratio of the centripetal or radial acceleration of the first body to that of the second is: w) 1 to 4 x) 1 to 3 y) 1 to 2 z) 1 to 1
Last Answer : ANSWER: Y -- 1 TO 2
Description : Two bodies each have a mass 'M'. If the mass of each body is doubled, the force of attraction between the two bodies is: w) twice the original force x) 1/4 the original force y) 4 times the original force z) unchanged
Last Answer : ANSWER: Y -- 4 TIMES THE ORIGINAL FORCE
Description : Infrared rays are absorbed best by which one of the following. Is it: w) bodies of air x) white bodies with rough surfaces y) mirrors z) black bodies with rough surfaces
Last Answer : ANSWER: Z -- BLACK BODIES WITH ROUGH SURFACES
Description : (2) experience collision less frequently Explanation: When an electric field is applied, both the valence electrons and the free electrons move in the same direction. The hole direction is opposite to that ... to free electrons. This means mobility is also less for a hole compared to free electron.
Last Answer : Carbon dioxide is called a greenhouse gas because - (1) its concentration remains always higher than other gases (2) it is used in photosynthesis (3) it absorbs infrared radiation (4) it emits visible radiation
Description : A body of mass M traveling with velocity v strikes body of mass M at rest. If the two bodies stick together during the collision, the loss of KE in the collision is (a) ½ initial KE (b) initial KE (c) All the initial KE (d) No loss of KE
Last Answer : Ans:(a)
Description : A girl throws a 0.1 kilogram ball at a wall. The ball hits the wall perpendicularly with a velocity of 5 meters per second and then bounces straight back with a velocity of 4 meters per second. The ... .4 kilogram-meters per second y) 0.5 kilogram-meters per second z) 0.9 kilogram-meters per second
Last Answer : ANSWER: Z -- 0.9 KILOGRAM-METERS PER SECOND
Description : A small hole in a sheet of aluminum foil is used to diffract yellow light both under water and in a vacuum. Which is true? w) light diffracts less in the water because its wavelength is ... because its wavelength is larger. z) light diffracts more in the water because its wavelength is smaller.
Last Answer : ANSWER: X -- LIGHT DIFFRACTS LESS IN THE WATER BECAUSE ITS WAVELENGTH IS SMALLER
Description : Ten coulombs of charge are placed on a solid copper sphere. Once the charge has come to rest, the ELECTRIC POTENTIAL inside the sphere is found to be: w) zero x) uniform inside the sphere and ... the sphere y) smaller than the electric potential outside the sphere z) varying as one over r squared
Last Answer : ANSWER: X -- UNIFORM INSIDE THE SPHERE AND EQUAL TO THE ELECTRIC POTENTIAL ON THE SURFACE OF THE SPHERE
Description : Five coulombs of charge are placed on a thin-walled conducting shell. Once the charge has come to rest, the electric potential inside the hollow conducting shell is found to be: w) zero x) uniform ... sphere y) smaller than the electric potential outside the sphere z) varying as one over r squared.
Last Answer : ANSWER: X -- UNIFORM INSIDE THE SPHERE AND EQUAL TO THE ELECTRIC OTENT
Description : A satellite of mass "M" is in orbit around the earth. If a second satellite of mass "2M" is to be placed in the same orbit, the second satellite must have a velocity which is: w) half ... first satellite y) twice the velocity of the first satellite z) four times the velocity of the first satellite
Last Answer : ANSWER: X -- THE SAME AS THE VELOCITY OF THE FIRST SATELLITE
Description : What two primary factors determine whether or no molecular collision leads to a chemical reaction? w) energy and volume of molecules x) energy and mass of molecules y) energy and orientation of molecules z) orientation and volume of molecules
Last Answer : ANSWER: Y -- ENERGY AND ORIENTATION OF MOLECULES
Description : If two different gases have the same volume, temperature, and pressure and behave like ideal gases, they will also be identical in which one of the following ways? w) average molecular velocity x) total mass y) total molecular kinetic energy z) average momentum per molecule
Last Answer : ANSWER: Y -- TOTAL MOLECULAR KINETIC ENERGY
Description : The non-relativistic mass of an object w) must be the same as its weight x) depends on where you measure it y) does not change with increasing velocity z) is greatest at the poles
Last Answer : ANSWER: Y -- DOES NOT CHANGE WITH INCREASING VELOCITY
Description : The idea that we CANNOT know both the position and velocity of a subatomic particle at the same time was formulated by: w) Einstein x) Heisenberg y) Fermi z) Schroedinger
Last Answer : ANSWER: X -- HEISENBERG