Question 1

In simple harmonic motion, when is the speed the greatest? (There could be more than one correct choice.)

Accepted Answer

A)  when the magnitude of the acceleration is a maximum 
B)  when the potential energy is a zero 
C)  when the potential energy is a maximum 
D)  when the displacement is a maximum 
E)  when the magnitude of the acceleration is a minimum 
A)  when the magnitude of the acceleration is a maximum 
B)  when the potential energy is a zero 
C)  when the potential energy is a maximum 
D)  when the displacement is a maximum 
E)  when the magnitude of the acceleration is a minimum

Question 2

Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 5.00 m. A person is standing 12.0 m away from the wall, equidistant
From the loudspeakers. When the person moves 1.00 m parallel to the wall, she experiences
Destructive interference for the first time. What is the frequency of the sound? The speed of sound
In air is 343 m/s.

Accepted Answer

A)  211 Hz 
B)  422 Hz 
C)  674 Hz 
D)  256 Hz 
E)  512 Hz 
A)  211 Hz 
B)  422 Hz 
C)  674 Hz 
D)  256 Hz 
E)  512 Hz

Question 3

An ideal gas undergoes an adiabatic process while doing 25 J of work. What is the change in the internal (thermal) energy of the gas?

Accepted Answer

A)  25 J 
B)  -50 J 
C)  -25 J 
D)  50 J 
E)  0 J 
A)  25 J 
B)  -50 J 
C)  -25 J 
D)  50 J 
E)  0 J

Question 4

In a resonating pipe that is open at both ends, there

Accepted Answer

A)  are displacement nodes at each end. 
B)  is a displacement node at one end and a displacement antinode at the other end. 
C)  are displacement antinodes at each end. 
D)  None of the above choices are correct. 
A)  are displacement nodes at each end. 
B)  is a displacement node at one end and a displacement antinode at the other end. 
C)  are displacement antinodes at each end. 
D)  None of the above choices are correct.

Question 5

Two in-phase loudspeakers are 3.0 m apart. They emit sound with a frequency of 490 Hz. A microphone is placed half-way between the speakers and then moved along the line joining the
Two speakers until the first point of constructive interference is found. At what distance from that
Midpoint is that first point? The speed of sound in air is 343 m/s.

Accepted Answer

A)  0.50 m 
B)  0.35 m 
C)  0.70 m 
D)  0.18 m 
E)  There is no point in that line where constructive interference occurs. 
A)  0.50 m 
B)  0.35 m 
C)  0.70 m 
D)  0.18 m 
E)  There is no point in that line where constructive interference occurs.

Question 6

If two objects are electrically attracted to each other,

Accepted Answer

A)  both objects must be negatively charged. 
B)  one object must be negatively charged and the other object must be positively charged. 
C)  the objects could be electrically neutral. 
D)  both objects must be positively charged. 
E)  None of the above statements are absolutely true. 
A)  both objects must be negatively charged. 
B)  one object must be negatively charged and the other object must be positively charged. 
C)  the objects could be electrically neutral. 
D)  both objects must be positively charged. 
E)  None of the above statements are absolutely true.

Question 7

A cart starts from rest and accelerates uniformly at   for  5.0 s. It next maintains the velocity it has reached for  10 s. Then it slows down at a steady rate of   for  4.0 s. What is the final speed of the car?

Accepted Answer

A)   10 m/s 
B)   16 m/s 
C)   12 m/s 
D)   20 m/s 
A)   10 m/s 
B)   16 m/s 
C)   12 m/s 
D)   20 m/s

Question 8

A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held above the center of the coil with its south pole downward. The magnet and the coil are now both raised
Upward with the same velocities. As viewed from above, what is the direction of the current
Induced in the coil as the magnet approaches the coil?

Accepted Answer

A)  counterclockwise 
B)  clockwise 
C)  No current is induced in the coil. 
D)  An emf but no current is induced in the coil. 
A)  counterclockwise 
B)  clockwise 
C)  No current is induced in the coil. 
D)  An emf but no current is induced in the coil.

Question 9

A 15-m rope is pulled taut with a tension of 140 N. It takes 0.545 s for a wave to propagate along the rope. What is the mass of the rope?

Accepted Answer

A)  2.1 kg 
B)  2.8 kg 
C)  1.7 kg 
D)  3.2 kg 
E)  5.1 kg 
A)  2.1 kg 
B)  2.8 kg 
C)  1.7 kg 
D)  3.2 kg 
E)  5.1 kg

Question 10

A heat engine having the maximum possible efficiency has an efficiency of 35.0% when operating between two heat reservoirs. If the temperature of the hot reservoir is 700 K, what is the
Temperature of the cold reservoir?

Accepted Answer

A)  455 K 
B)  200 K 
C)  350 K 
D)  600 K 
E)  245 K 
A)  455 K 
B)  200 K 
C)  350 K 
D)  600 K 
E)  245 K

Question 11

Under what condition is average velocity equal to the average of the object's initial and final velocity?

Accepted Answer

A)  The acceleration is constant. 
B)  The acceleration must be constantly increasing. 
C)  This can occur only when the velocity is zero. 
D)  This can only occur if there is no acceleration. 
E)  The acceleration must be constantly decreasing. 
A)  The acceleration is constant. 
B)  The acceleration must be constantly increasing. 
C)  This can occur only when the velocity is zero. 
D)  This can only occur if there is no acceleration. 
E)  The acceleration must be constantly decreasing.

Question 12

Consider a deer that runs from point A to point B. The distance the deer runs can be greater than
the magnitude of its displacement, but the magnitude of the displacement can never be greater
than the distance it runs.

Accepted Answer

A) True 
 B)False

Question 13

The mass of a typical adult woman is closest to

Accepted Answer

A)  35 kg. 
B)  150 kg. 
C)  75 kg. 
D)  20 kg. 
A)  35 kg. 
B)  150 kg. 
C)  75 kg. 
D)  20 kg.

Question 14

A 4.0-kg aluminum block is originally at 10°C. If 160 kJ of heat is added to the block, what is its final temperature? The specific heat capacity of aluminum is 910 J/kg · K.

Accepted Answer

A)  24°C 
B)  34°C 
C)  54°C 
D)  44°C 
A)  24°C 
B)  34°C 
C)  54°C 
D)  44°C

Question 15

Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 8.00 m. A person is standing 12.0 m away from the wall, equidistant
From the loudspeakers. When the person moves 3.00 m parallel to the wall, she experiences
Destructive interference for the second time. What is the frequency of the sound? The speed of
Sound in air is 343 m/s.

Accepted Answer

A)  694 Hz 
B)  562 Hz 
C)  422 Hz 
D)  452 Hz 
E)  278 Hz 
A)  694 Hz 
B)  562 Hz 
C)  422 Hz 
D)  452 Hz 
E)  278 Hz

Question 16

A 0.50-kg object is attached to an ideal spring of spring constant (force constant) 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of
1)5 m/s at the equilibrium position. At what distance from the equilibrium position are the kinetic
Energy and potential energy of the system the same?

Accepted Answer

A)  0.029 m 
B)  0.12 m 
C)  0.17 m 
D)  0.017 m 
A)  0.029 m 
B)  0.12 m 
C)  0.17 m 
D)  0.017 m

Question 17

In a series RLC ac circuit, a second resistor is connected in parallel with the resistor previously in the circuit. As a result of this change, what happens to the impedance of the circuit?

Accepted Answer

A)  It decreases. 
B)  It does not change. 
C)  It decreases for frequencies below resonance and increases for frequencies above resonance. 
D)  It increases for frequencies below resonance and decreases for frequencies above resonance. 
E)  It increases. 
A)  It decreases. 
B)  It does not change. 
C)  It decreases for frequencies below resonance and increases for frequencies above resonance. 
D)  It increases for frequencies below resonance and decreases for frequencies above resonance. 
E)  It increases.

Question 18

Which of the following quantities has units of a velocity? (There could be more than one correct choice.)

Accepted Answer

A)   -120 m/s 
B)   186,000 mi 
C)    downward 
D)   40 km southwest 
E)   9.8 m/s downward 
A)   -120 m/s 
B)   186,000 mi 
C)    downward 
D)   40 km southwest 
E)   9.8 m/s downward

Question 19

Transverse waves travel at 43.2 m/s in a string that is subjected to a tension of 60.5 N. If the string is 15.9 m long, what is its mass?

Accepted Answer

A)  0.515 kg 
B)  0.597 kg 
C)  0.216 kg 
D)  0.366 kg 
A)  0.515 kg 
B)  0.597 kg 
C)  0.216 kg 
D)  0.366 kg

Question 20

A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in series with the first one, the time constant of the
New RC circuit will be

Accepted Answer

A)  smaller than before. 
B)  variable. 
C)  larger than before. 
D)  the same as before. 
A)  smaller than before. 
B)  variable. 
C)  larger than before. 
D)  the same as before.

Exam 2: Describing Motion: Kinematics in One Dimension

In simple harmonic motion, when is the speed the greatest? (There could be more than one correct choice.)

An ideal gas undergoes an adiabatic process while doing 25 J of work. What is the change in the internal (thermal) energy of the gas?

In a resonating pipe that is open at both ends, there

If two objects are electrically attracted to each other,

A cart starts from rest and accelerates uniformly at for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of for 4.0 s. What is the final speed of the car?

A 15-m rope is pulled taut with a tension of 140 N. It takes 0.545 s for a wave to propagate along the rope. What is the mass of the rope?

A heat engine having the maximum possible efficiency has an efficiency of 35.0% when operating between two heat reservoirs. If the temperature of the hot reservoir is 700 K, what is the Temperature of the cold reservoir?

Under what condition is average velocity equal to the average of the object's initial and final velocity?

Consider a deer that runs from point A to point B. The distance the deer runs can be greater than the magnitude of its displacement, but the magnitude of the displacement can never be greater than the distance it runs.

The mass of a typical adult woman is closest to

A 4.0-kg aluminum block is originally at 10°C. If 160 kJ of heat is added to the block, what is its final temperature? The specific heat capacity of aluminum is 910 J/kg · K.

In a series RLC ac circuit, a second resistor is connected in parallel with the resistor previously in the circuit. As a result of this change, what happens to the impedance of the circuit?

Which of the following quantities has units of a velocity? (There could be more than one correct choice.)

Transverse waves travel at 43.2 m/s in a string that is subjected to a tension of 60.5 N. If the string is 15.9 m long, what is its mass?

A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in series with the first one, the time constant of the New RC circuit will be

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