Question 1

A certain particle has a kinetic energy of 3.2 *10-10 J and a momentum of 1.7 * 10-18 kg. m/s.Its mass is:

Accepted Answer

A) 9.1 * 10-31 kg 
B) 2.7 * 10-27 kg 
C) 4.5 * 10-27 kg 
D) 6.3 * 10-27 kg 
E) 8.6 *10-27 kg 
A) 9.1 * 10-31 kg 
B) 2.7 * 10-27 kg 
C) 4.5 * 10-27 kg 
D) 6.3 * 10-27 kg 
E) 8.6 *10-27 kg

Question 2

A source at rest emits light of wavelength 500 nm.When it is moving at 0.90c toward an observer, the observer detects light of wavelength:

Accepted Answer

A) 26 nm 
B) 115 nm 
C) 500 nm 
D) 2200 nm 
E) 9500 nm 
A) 26 nm 
B) 115 nm 
C) 500 nm 
D) 2200 nm 
E) 9500 nm

Question 3

Two events occur simultaneously at separated points on the y axis of reference frame S.According to an observer moving in the positive x direction:

Accepted Answer

A) the event with the greater y coordinate occurs first 
B) the event with the greater y coordinate occurs last 
C) either event might occur first, depending on the observer's speed 
D) the events are simultaneous 
E) none of the above 
A) the event with the greater y coordinate occurs first 
B) the event with the greater y coordinate occurs last 
C) either event might occur first, depending on the observer's speed 
D) the events are simultaneous 
E) none of the above

Question 4

An electron (m = 9.11 * 10-31 kg)has a momentum of 1.3 *10-21 kg .m/s.Its kinetic energy is:

Accepted Answer

A) 6.3 *10-14 J 
B) 8.2 * 10-14 J 
C) 1.5 * 10-13 J 
D) 3.2 * 10-13 J 
E) 4.0 *10-13 J 
A) 6.3 *10-14 J 
B) 8.2 * 10-14 J 
C) 1.5 * 10-13 J 
D) 3.2 * 10-13 J 
E) 4.0 *10-13 J

Question 5

The magnitude of the momentum of a particle can never exceed:

Accepted Answer

A) mc, where m is its mass 
B) E/c, where E is its energy 
C) K/c, where K is its kinetic energy 
D) none of the above, but there is an upper limit 
E) none of the above; there is no upper limit 
A) mc, where m is its mass 
B) E/c, where E is its energy 
C) K/c, where K is its kinetic energy 
D) none of the above, but there is an upper limit 
E) none of the above; there is no upper limit

Question 6

Relative to reference frame 1, reference frame 2 moves with speed v in the negative x direction.When the origins of the two frames coincide the clocks in both frames are set to zero.An event occurs at coordinate x1 and time t1 as measured in reference frame 1 and at coordinate x2 and time t2 as measured in frame 2.If , then the coordinates and times of the event are related by:

Accepted Answer

A) x2 = $\gamma$[x1 - vt1] and t2 = $\gamma$[t1 - vx1 / c2] 
B) x2 = $\gamma$[x1 - vt1] and t2 = $\gamma$[t1 + vx1 / c2] 
C) x2 = $\gamma$[x1 + vt1] and t2 = $\gamma$[t1 - vx1 / c2] 
D) x2 = $\gamma$[x1 + vt1] and t2 = $\gamma$[t1 + vx1 / c2] 
E) none of the above are correct 
A) x2 = $\gamma$[x1 - vt1] and t2 = $\gamma$[t1 - vx1 / c2] 
B) x2 = $\gamma$[x1 - vt1] and t2 = $\gamma$[t1 + vx1 / c2] 
C) x2 = $\gamma$[x1 + vt1] and t2 = $\gamma$[t1 - vx1 / c2] 
D) x2 = $\gamma$[x1 + vt1] and t2 = $\gamma$[t1 + vx1 / c2] 
E) none of the above are correct

Question 7

While emitting light of proper frequency f0, a source moves to the right with speed c/4 relative to reference frame S.A detector, to the left of the source, measures the frequency to be f, which is greater than f0.This means:

Accepted Answer

A) the detector is moving to the right with a speed that is greater than c/4 relative to S 
B) the detector is moving to the right with a speed that is less than c/4 relative to S 
C) the detector is moving to the left with a speed that is greater than c/4 relative to S 
D) the detector is moving to the left with a speed that is less than c/4 relative to S 
E) the detector is not moving 
A) the detector is moving to the right with a speed that is greater than c/4 relative to S 
B) the detector is moving to the right with a speed that is less than c/4 relative to S 
C) the detector is moving to the left with a speed that is greater than c/4 relative to S 
D) the detector is moving to the left with a speed that is less than c/4 relative to S 
E) the detector is not moving

Question 8

A particle with rest mass m moves with speed 0.6c.Its kinetic energy is:

Accepted Answer

A) 0.18mc2 
B) 0.22mc2 
C) 0.25mc2 
D) mc2 
E) 1.25mc2 
A) 0.18mc2 
B) 0.22mc2 
C) 0.25mc2 
D) mc2 
E) 1.25mc2

Exam 37: Relativity

A certain particle has a kinetic energy of 3.2 *10-10 J and a momentum of 1.7 * 10-18 kg. m/s.Its mass is:

A source at rest emits light of wavelength 500 nm.When it is moving at 0.90c toward an observer, the observer detects light of wavelength:

Two events occur simultaneously at separated points on the y axis of reference frame S.According to an observer moving in the positive x direction:

An electron (m = 9.11 * 10-31 kg)has a momentum of 1.3 *10-21 kg .m/s.Its kinetic energy is:

The magnitude of the momentum of a particle can never exceed:

While emitting light of proper frequency f0, a source moves to the right with speed c/4 relative to reference frame S.A detector, to the left of the source, measures the frequency to be f, which is greater than f0.This means:

A particle with rest mass m moves with speed 0.6c.Its kinetic energy is:

Measurement

Motion Along a Straight Line

Vector

Motion in Two and Three Dimensions

Force and Motion I

Force and Motion II

Kinetic Energy and Work

Potential Energy and Conservation of Energy

Center of Mass and Linear Momentum

Rotation

Rolling, Torque, and Angular Momentum

Equilibrium and Elasticity

Gravitation

Fluids

Oscillations

Waves I

Waves II

Temperature, Heat, and the First Law of Thermodynamics

The Kinetic Theory of Gases

Entropy and the Second Law of Thermodynamics

Electric Charge

Electric Fields

Gauss Law

Electric Potential

Capacitance

Current and Resistance

Circuits

Magnetic Fields

Magnetic Fields Due to Currents

Induction and Inductance

Electromagnetic Oscillations and Alternating Current

Maxwells Equations; Magnetism of Matter

Electromagnetic Waves

Images

Interference

Diffraction

Photons and Matter Waves

More About Matter Waves

All About Atoms

Conduction of Electricity in Solids

Nuclear Physics

Energy From the Nucleus

Quarks, Leptons, and the Big Bang

Filters

A certain particle has a kinetic energy of 3.2 10^-10 J and a momentum of 1.7 10^-18 kg. m/s.Its mass is:

An electron (m = 9.11 * 10^-31 kg)has a momentum of 1.3 *10^-²¹ kg .m/s.Its kinetic energy is:

While emitting light of proper frequency f₀, a source moves to the right with speed c/4 relative to reference frame S.A detector, to the left of the source, measures the frequency to be f, which is greater than f₀.This means: