Question 1

If Michelson and Morley had performed a version of their experiment with sound waves, they would not have "heard a fringe shift" in which of the following cases?

Accepted Answer

A)  The experimental apparatus was on an open flat car that was not moving, and there was no wind. 
B)  The experimental apparatus was on an open flat car that was not moving, and there was a wind. 
C)  The experimental apparatus was on an open flat car that was moving, and there was no wind. 
D)  The experimental apparatus was on an open flat car that was moving, and there was a headwind. 
E)  All of these are correct. 
A)  The experimental apparatus was on an open flat car that was not moving, and there was no wind. 
B)  The experimental apparatus was on an open flat car that was not moving, and there was a wind. 
C)  The experimental apparatus was on an open flat car that was moving, and there was no wind. 
D)  The experimental apparatus was on an open flat car that was moving, and there was a headwind. 
E)  All of these are correct.

Question 2

Which of the following statement(s) is (are) a consequence of Einstein's postulates?

Accepted Answer

A)  Every observer in every reference frame measures the same value for the speed of light. 
B)  Moving clocks appear to run slow. 
C)  Moving objects appear to be contracted along the direction of motion. 
D)  Clocks synchronized in one reference frame are not synchronized in any frame moving relative to that reference frame. 
E)  All of these are consequences of Einstein's postulates. 
A)  Every observer in every reference frame measures the same value for the speed of light. 
B)  Moving clocks appear to run slow. 
C)  Moving objects appear to be contracted along the direction of motion. 
D)  Clocks synchronized in one reference frame are not synchronized in any frame moving relative to that reference frame. 
E)  All of these are consequences of Einstein's postulates.

Question 3

Einstein's Second Postulate states that nothing can travel faster than the speed of light. The momentum of a particle of rest mass m

Accepted Answer

A)  has an upper limit of mc. 
B)  has an upper limit of 2mc. 
C)  is infinite as the speed approaches c. 
D)  has an upper limit of 0.5mc. 
E)  none of the above 
A)  has an upper limit of mc. 
B)  has an upper limit of 2mc. 
C)  is infinite as the speed approaches c. 
D)  has an upper limit of 0.5mc. 
E)  none of the above

Question 4

An airplane flies from point A to point B, a distance of 100 km, and back again with an airspeed of 250 km/h. What is the difference in the time for this round trip on a day when a wind of speed 50.0 km/h blows from A toward B and on a day when a wind of speed 50.0 km/h blows in a direction perpendicular to AB?

Accepted Answer

A)  zero 
B)  1.0 min 
C)  5.5 min 
D)  4.5 min 
E)  10 min 
A)  zero 
B)  1.0 min 
C)  5.5 min 
D)  4.5 min 
E)  10 min

Question 5

If one gram of matter could be completely converted into energy, the yield would be

Accepted Answer

A)  0.51 MeV 
B)  931 MeV 
C)  3 * 1013 J 
D)  9 * 1013 J 
E)  9 * 1016 J 
A)  0.51 MeV 
B)  931 MeV 
C)  3 * 1013 J 
D)  9 * 1013 J 
E)  9 * 1016 J

Question 6

A radioactive atom is traveling through the laboratory at a speed of 0.2c when it undergoes beta decay. The emitted electron moves in the same direction as the atom and has a speed of 0.9c relative to the atom. The speed of the electron, as seen by an observer in the laboratory, is

Accepted Answer

A)  1.10c 
B)  1.07c 
C)  c 
D)  0.93c 
E)  0.70c 
A)  1.10c 
B)  1.07c 
C)  c 
D)  0.93c 
E)  0.70c

Question 7

You place two clocks that you consider to be synchronized on a road 100 m apart. Your friend drives by at speed V and observes the clocks to be out of sync by an amount T. When you place the clocks 200 m apart and your friend drives by at speed 2V, by what amount will your friend claim the clocks to be out of sync?

Accepted Answer

A)  T 
B)  2T 
C)  4T 
D)  T/2 
E)  T/4 
A)  T 
B)  2T 
C)  4T 
D)  T/2 
E)  T/4

Question 8

The principle of Newtonian relativity predicts that

Accepted Answer

A)  absolute motion can be detected. 
B)  absolute motion cannot be detected. 
C)  relative motion can be detected. 
D)  relative motion cannot be detected. 
E)  both absolute and relative motion can be detected. 
A)  absolute motion can be detected. 
B)  absolute motion cannot be detected. 
C)  relative motion can be detected. 
D)  relative motion cannot be detected. 
E)  both absolute and relative motion can be detected.

Question 9

A particle accelerator collides beams of protons and anti-protons with equal and opposite momenta. The aim of an experiment is to create a possible new massive particle with neutral charge and a mass 6 times that of a single proton. Calculate the necessary speed of the protons (and anti-protons) in the collision as a % of the speed of light.

Accepted Answer

A)  85.9% c 
B)  99.9% c 
C)  98.7% c 
D)  94.3% c 
E)  None of these is correct. 
A)  85.9% c 
B)  99.9% c 
C)  98.7% c 
D)  94.3% c 
E)  None of these is correct.

Question 10

What is the speed of an electron whose kinetic energy equals its rest mass?

Accepted Answer

A)  0.5c 
B)  0.67c 
C)    
D)    
E)    
A)  0.5c 
B)  0.67c 
C)    
D)    
E)

Question 11

You measure the length of a passing Imperial Starcruiser spacecraft to be 100 m. If the Starcruiser is moving at 80% the speed of light, what would be its length if it was at rest relative to you?

Accepted Answer

A)  280 m 
B)  60 m 
C)  36 m 
D)  170 m 
E)  125 m 
A)  280 m 
B)  60 m 
C)  36 m 
D)  170 m 
E)  125 m

Question 12

As an object of mass M approaches the speed of light, its momentum approaches

Accepted Answer

A)  zero 
B)  infinity 
C)  Mc 
D)  Mc2  
E)  c 
A)  zero 
B)  infinity 
C)  Mc 
D)  Mc2  
E)  c

Question 13

A standard Canadian football field is 100 m long and 60 m wide. A UFO streaks from one end of the field to the other at a speed of 0.6c relative to the players on the field. An observer in the UFO measures the length of the field to be

Accepted Answer

A)  60 m 
B)  80 m 
C)  100 m 
D)  125 m 
E)  167 m 
A)  60 m 
B)  80 m 
C)  100 m 
D)  125 m 
E)  167 m

Question 14

An electron traveling at 0.980c has a total energy of

Accepted Answer

A)  0.245 MeV 
B)  0.511 MeV 
C)  0.756 MeV 
D)  1.736 MeV 
E)  2.55 MeV 
A)  0.245 MeV 
B)  0.511 MeV 
C)  0.756 MeV 
D)  1.736 MeV 
E)  2.55 MeV

Question 15

The results of the Michelson-Morley experiment can be interpreted to indicate that if an ether exists,

Accepted Answer

A)  light waves and sound waves are the same. 
B)  light waves and sound waves are not the same. 
C)  the ether is dragged along by the experiment. 
D)  the ether is not dragged along by the experiment. 
E)  the speed of light in the ether is 3 *108 m/s. 
A)  light waves and sound waves are the same. 
B)  light waves and sound waves are not the same. 
C)  the ether is dragged along by the experiment. 
D)  the ether is not dragged along by the experiment. 
E)  the speed of light in the ether is 3 *108 m/s.

Question 16

At what speed would an electron's mass be measured as 4 times its rest mass?

Accepted Answer

A)  0.88c 
B)  0.97c 
C)  0.94c 
D)  0.25c 
E)  0.063c 
A)  0.88c 
B)  0.97c 
C)  0.94c 
D)  0.25c 
E)  0.063c

Question 17

The total yearly world consumption of energy is approximately 4.0 * 1020 J. How much mass would have to be completely converted into energy to provide this amount of energy?

Accepted Answer

A)  4.4 * 103 kg 
B)  1.3 *1012 kg 
C)  1.3 * 104 kg 
D)  4.4 * 105 kg 
E)  2.2 * 104 kg 
A)  4.4 * 103 kg 
B)  1.3 *1012 kg 
C)  1.3 * 104 kg 
D)  4.4 * 105 kg 
E)  2.2 * 104 kg

Question 18

What is the momentum of an electron whose kinetic energy equals its rest mass, m?

Accepted Answer

A)  0.5 mc kg.m/s 
B)    kg.m/s 
C)    kg.m/s 
D)    kg.m/s 
E)    kg.m/s 
A)  0.5 mc kg.m/s 
B)    kg.m/s 
C)    kg.m/s 
D)    kg.m/s 
E)    kg.m/s

Question 19

Systems S and S' are in relative motion as indicated in the sketch. Metersticks and clocks in S' agree with metersticks and clocks in S when t = t' = 0. An observer in S' notes that two events occuring at x1' and x2' are simultaneous; i.e.$\Delta$x' > 0 and $\Delta$t' = 0 for the observer in S'. An observer in S, seeing the same two events, may find that

Accepted Answer

A)  $\Delta$x > $\Delta$x' and $\Delta$t > 0 
B)  $\Delta$x >$\Delta$x' and$\Delta$t = 0 
C)  $\Delta$x =$\Delta$x' and $\Delta$t = 0 
D)  $\Delta$x  0 
A)  $\Delta$x > $\Delta$x' and $\Delta$t > 0 
B)  $\Delta$x >$\Delta$x' and$\Delta$t = 0 
C)  $\Delta$x =$\Delta$x' and $\Delta$t = 0 
D)  $\Delta$x  0

Question 20

A pion lives 26 ns in its rest frame. It travels 15 cm down a beam pipe in a particle accelerator before it decays into other particles. How far is this in the rest frame of the pion?

Accepted Answer

A)  19.026 cm 
B)  18.465 cm 
C)  16.123 cm 
D)  14.997 cm 
E)  12.886 cm 
A)  19.026 cm 
B)  18.465 cm 
C)  16.123 cm 
D)  14.997 cm 
E)  12.886 cm

If Michelson and Morley had performed a version of their experiment with sound waves, they would not have "heard a fringe shift" in which of the following cases?

Which of the following statement(s) is (are) a consequence of Einstein's postulates?

Einstein's Second Postulate states that nothing can travel faster than the speed of light. The momentum of a particle of rest mass m

If one gram of matter could be completely converted into energy, the yield would be

A radioactive atom is traveling through the laboratory at a speed of 0.2c when it undergoes beta decay. The emitted electron moves in the same direction as the atom and has a speed of 0.9c relative to the atom. The speed of the electron, as seen by an observer in the laboratory, is

The principle of Newtonian relativity predicts that

What is the speed of an electron whose kinetic energy equals its rest mass?

You measure the length of a passing Imperial Starcruiser spacecraft to be 100 m. If the Starcruiser is moving at 80% the speed of light, what would be its length if it was at rest relative to you?

As an object of mass M approaches the speed of light, its momentum approaches

A standard Canadian football field is 100 m long and 60 m wide. A UFO streaks from one end of the field to the other at a speed of 0.6c relative to the players on the field. An observer in the UFO measures the length of the field to be

An electron traveling at 0.980c has a total energy of

The results of the Michelson-Morley experiment can be interpreted to indicate that if an ether exists,

At what speed would an electron's mass be measured as 4 times its rest mass?

The total yearly world consumption of energy is approximately 4.0 * 10²⁰ J. How much mass would have to be completely converted into energy to provide this amount of energy?

What is the momentum of an electron whose kinetic energy equals its rest mass, m?

A pion lives 26 ns in its rest frame. It travels 15 cm down a beam pipe in a particle accelerator before it decays into other particles. How far is this in the rest frame of the pion?

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

Exam 19: Relativity

If Michelson and Morley had performed a version of their experiment with sound waves, they would not have "heard a fringe shift" in which of the following cases?

Which of the following statement(s) is (are) a consequence of Einstein's postulates?

Einstein's Second Postulate states that nothing can travel faster than the speed of light. The momentum of a particle of rest mass m

If one gram of matter could be completely converted into energy, the yield would be

A radioactive atom is traveling through the laboratory at a speed of 0.2c when it undergoes beta decay. The emitted electron moves in the same direction as the atom and has a speed of 0.9c relative to the atom. The speed of the electron, as seen by an observer in the laboratory, is

The principle of Newtonian relativity predicts that

What is the speed of an electron whose kinetic energy equals its rest mass?

You measure the length of a passing Imperial Starcruiser spacecraft to be 100 m. If the Starcruiser is moving at 80% the speed of light, what would be its length if it was at rest relative to you?

As an object of mass M approaches the speed of light, its momentum approaches

A standard Canadian football field is 100 m long and 60 m wide. A UFO streaks from one end of the field to the other at a speed of 0.6c relative to the players on the field. An observer in the UFO measures the length of the field to be

An electron traveling at 0.980c has a total energy of

The results of the Michelson-Morley experiment can be interpreted to indicate that if an ether exists,

At what speed would an electron's mass be measured as 4 times its rest mass?

The total yearly world consumption of energy is approximately 4.0 * 1020 J. How much mass would have to be completely converted into energy to provide this amount of energy?

What is the momentum of an electron whose kinetic energy equals its rest mass, m?

A pion lives 26 ns in its rest frame. It travels 15 cm down a beam pipe in a particle accelerator before it decays into other particles. How far is this in the rest frame of the pion?

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

The total yearly world consumption of energy is approximately 4.0 * 10²⁰ J. How much mass would have to be completely converted into energy to provide this amount of energy?