PHY 111 FINAL EXAM QUESTIONS WITH COMPLETE
SOLUTIONS
**LOOK AT NOTES FOR INTRO AND EQUATIONS** (23-
25)
-IF the student measures the frequency of the first standing
wave, f0 to be 165 Hz, what is the frequency of the second
possible standing wave Correct Answers 330 Hz
**LOOK AT NOTES FOR INTRO AND EQUATIONS** (23-
25)
-In one experiment the student hangs a mass M of 2.5 kg at the
end of the string. Determine the frequency f0 for the first
standing wave Correct Answers 157 Hz
**LOOK AT NOTES FOR INTRO AND EQUATIONS** (23-
25)
-What is the wavelength for the standing wave with frequency
fo? Correct Answers 2 m
A 1.2 kg rock is swung around on a string in a vertical circle
with a radius of 0.85 m. The minimum speed required for the
rock at the top of the circle to keep it in it's circular path is
Correct Answers 2.9 m/s
A flatbed truck carrying a light box makes a sharp turn and the
box slides off the truck bed. In what direction will the box slide?
Correct Answers along the tangent to its circular path
A heavy mass is suspended on a 10 m long steel cable. As a
result the cable stretches 2 cm. If the same mass were to be
, suspended on a two parallel 10 m long sections of the same
cable, ho much would the cable stretch? Correct Answers 1
cm( NOTES)
A nice is measured at a decibel level of 96 dB. If a set of
earplugs reduces the decibel level to 76 dB, its intensity will be:
Correct Answers reduced by a factor of 100 (NOTES)
A pool is 90% filled with water and the pressure at the bottom of
the pool is measured to be P. A student goes swimming in the
pool. What is the pressure at the bottom of the pool when the
student is swimming? Correct Answers a pressure > P
A student sets up a meterstick resting on a stand at the 80-cm
mark and held in place by a scale attached at the zero cm mark
as shown in the figure below(NOTES!)A mass, M, is then
attached to the meter stick at some point between the stand and
the scale. Assume the mass of the meter stick is negligible. The
student proceeds to measure the force, F, shown on the scale for
different values of mass M and for different locations of mass
M.
- In an experiment, the student places a mass M at the 20 cm
mark and records the force measured by the scale. When she
later slides the same mass to the 60 cm mark, what will happen
to the force measured by the scale? Correct Answers the force
will be reduced to one third.
A student sets up a meterstick resting on a stand at the 80-cm
mark and held in place by a scale attached at the zero cm mark
as shown in the figure below(NOTES!)A mass, M, is then
attached to the meter stick at some point between the stand and
SOLUTIONS
**LOOK AT NOTES FOR INTRO AND EQUATIONS** (23-
25)
-IF the student measures the frequency of the first standing
wave, f0 to be 165 Hz, what is the frequency of the second
possible standing wave Correct Answers 330 Hz
**LOOK AT NOTES FOR INTRO AND EQUATIONS** (23-
25)
-In one experiment the student hangs a mass M of 2.5 kg at the
end of the string. Determine the frequency f0 for the first
standing wave Correct Answers 157 Hz
**LOOK AT NOTES FOR INTRO AND EQUATIONS** (23-
25)
-What is the wavelength for the standing wave with frequency
fo? Correct Answers 2 m
A 1.2 kg rock is swung around on a string in a vertical circle
with a radius of 0.85 m. The minimum speed required for the
rock at the top of the circle to keep it in it's circular path is
Correct Answers 2.9 m/s
A flatbed truck carrying a light box makes a sharp turn and the
box slides off the truck bed. In what direction will the box slide?
Correct Answers along the tangent to its circular path
A heavy mass is suspended on a 10 m long steel cable. As a
result the cable stretches 2 cm. If the same mass were to be
, suspended on a two parallel 10 m long sections of the same
cable, ho much would the cable stretch? Correct Answers 1
cm( NOTES)
A nice is measured at a decibel level of 96 dB. If a set of
earplugs reduces the decibel level to 76 dB, its intensity will be:
Correct Answers reduced by a factor of 100 (NOTES)
A pool is 90% filled with water and the pressure at the bottom of
the pool is measured to be P. A student goes swimming in the
pool. What is the pressure at the bottom of the pool when the
student is swimming? Correct Answers a pressure > P
A student sets up a meterstick resting on a stand at the 80-cm
mark and held in place by a scale attached at the zero cm mark
as shown in the figure below(NOTES!)A mass, M, is then
attached to the meter stick at some point between the stand and
the scale. Assume the mass of the meter stick is negligible. The
student proceeds to measure the force, F, shown on the scale for
different values of mass M and for different locations of mass
M.
- In an experiment, the student places a mass M at the 20 cm
mark and records the force measured by the scale. When she
later slides the same mass to the 60 cm mark, what will happen
to the force measured by the scale? Correct Answers the force
will be reduced to one third.
A student sets up a meterstick resting on a stand at the 80-cm
mark and held in place by a scale attached at the zero cm mark
as shown in the figure below(NOTES!)A mass, M, is then
attached to the meter stick at some point between the stand and
