ch 26 - theory of relativity

as the speed of a particle approaches the speed of light the mass of the particle A increases B decreases C remains the same D approaches zero

A

as the speed of a particle approaches the speed of light the momentum of the particle A increases B decreases C remains the same D approaches zero

A

michaelson and morley concluded from the results of their experiment that A the experiment was a failure since there was no detectable shift in the interference pattern B the experiment was successful in not detecting a shift in the interference pattern C the experiment was a failure since they detected a shift in the interference pattern D the experiment was successful in detecting a shift in the interference pattern

A

relative to a stationary observer a moving clock A always runs slower than normal B always runs faster than normal C keeps its normal time D can do any of the above

A

relative to a stationary observer a moving object A appears shorter than normal B appears longer than normal C keeps its same length time D can do any of the above

A

suppose one twin takes a ride in a spaceship traveling at a very high speed to a distant star and back again, while the other twin remains on earth. the twin that remained on earth predicts that the astronaut twin is A younger B the same age C older D cannot be determined

A

what happens to the total relativistic energy of a speedy proton when its relativistic mass doubles? A it doubles B it more than doubles C it less than doubles D it must increase, but it is impossible to say by how much

A

a spear is thrown by you at a very high speed. as it passes you measure its length at one-half its normal length. from this measurement you can conclude that the moving spear's mass must be A 1/2 its rest mass B twice its rest mass C four times its rest mass D none

B

an objects moves in a direction parallel to its length with a velocity that approaches the velocity of light. the length of this object as measured by a stationary observer A approaches infinity B approaches zero C increases slightly D does not change

B

one of einstein's postulates in formulating the special theory of relativity was that the laws of physics are the same in reference frames that A accelerate B move at a constant velocity with respect to an inertial frame C oscillate D are stationary, but not in moving frames

B

what happens to the kinetic energy of a speedy proton when its relativistic mass doubles? A it doubles B it more than doubles C it less than doubles D it must increase, but it is impossible to say by how much

B

you can build an interferometer yourself if you use the following components A a light source, a detector screen, a partially silvered mirror, a flat mirror and a glass plate B a light source, a detector screen, two partially silvered mirrors, and a glass plate C a light source, a detector screen, two partially silvered mirrors, a flat mirror, and a glass plate D a light source, a detector screen, a partially silvered mirror, two flat mirrors, and a glass plate

D

consider a particle of mass m and rest mass mo. which of the following is the correct expression for the kinetic energy of such a particle? A mov2/2 B mv2/2 C mc2-moc2 D 1/2(mc2-moc2)

C

if you were to measure your pulse rate while in a spaceship moving away from the sun at a speed close to the speed of light you would find that it was A much faster than normal B much slower than normal C the same as it was here on earth

C

the gamma factor is defined as y=1/square root((1-(v/c)2) therefore gamma A can be zero B can be any number less than or equal to one C can by any number greater than or equal to one D cannot equal one

C

the michaelson-morley experiment was designed to measure A the relativistic mass of the electron B the relativistic energy of the electron C the velocity of the earth relative to ether D the acceleration of gravity on the earth's surface

C

the theory of special relativity A is based on a complex mathematical analysis B has not been verified by experiment C does not agree with newtonian mechanics D does not agree with electromagnetic theory

C

an object moves in a direction parallel to its length with a velocity that approaches the velocity of light. the width of this object as measured by a stationary observer A approaches infinity B approaches zero C increases slightly D does not change

D

consider two spaceships each traveling at 0.5c in a straight line. ship A is moving directly away from the sun and ship B is approaching the sun. the science officers on each ship measure the velocity of light coming from the sun. what do they measure for this velocity? A ship a measures it as less than c, and ship B measures it as greater than c B ship b measures it as less than c, and ship a measures it as greater than c C on both ships it is measured to be less than c D on both ships it is measured to be exactly c

D

which of the following depends on the observer's frame of reference? A the mass of the proton B the length of a meter stick C the half-life of a muon D all of the given

D

you are reading in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. you wish to determine if the ship is stopped or moving at constant velocity. what should you do? A you can determine if the ship is moving by determining the apparent velocity of light B you can determine if the ship is moving by checking your precision time piece. if it's running slow, the ship is moving C you can determine if the ship is moving either by determining the apparent velocity of light or by checking your precision time piece. if it's running slow the ship is moving D you should give up because you have taken on an impossible task

D

as the velocity of your spaceship increases, you would observe A that your precision clock runs slower than normal B that the length of your spaceship has decreased C that your mass has increased D all of the above E none of the above

E