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WorksheetsMidterm Exam 11/22
Total questions: 60
Worksheet time: 2hrs 34mins
Which of the following is a unit of force?
kilogram
newton
kg-m/sec
m/s2
The length of a physics classroom is closest to
10-2 meters
10-1 meters
101 meters
104 meters
What is the approximate diameter of a dinner plate?
0.0025 m
0.025 m
0.25 m
2.5 m
The height of an adult is approximately 1.75
cm
m
mm
km
The mass of a high school football player is approximately
100 kg
101 kg
102 kg
103 kg
Which letter corresponds to the amplitude?
A
B
C
D
Which letter corresponds to the wavelength?
A
B
C
D
Which sound wave has the lowest pitch?
4. Why do we hear thunder after we see a flash of lightning, usually some time later?
Sound travels at a speed of 300,000,000 m/s. while light travels at a speed of 330 m/s.
Sound travels at a speed of 330 m/s while light travels at a speed of 3,000,000 m/s.
Sound travels at a speed of 330 m/s while light travels at a speed of 300,000,000 m/s.
Because lightning does not cause thunder.
If the period of a wave is 0.2 seconds, its frequency is
5 Hz
25 Hz
30 Hz
15 Hz
How does the Doppler effect tell us that there was a Big Bang causing the universe to expand from one small point?
Galaxies make lots of sound waves.
Galaxies are blue shifted and moving toward us.
Galaxies are redshifted and moving away from us.
No connection. Light waves aren't visible in the universe.
What is a repeating periodic set interval of increased amplitude where parts of overlapping waves have constructive interference?
Beats
Noise
Node
Antinode
Look at the diagram. At which positions will the overlapping waves have the most constructive interference?
Positions #1 & #5
Positions #2 & #3
Positions #3 & #4
Positions #4 & #5
Look at the diagram. At which positions will the overlapping waves have the most destructive interference?
Positions #1 & #5
Positions #2 & #3
Positions #3 & #4
Positions #4 & #5
If waves overlap and are out of phase, how will that affect the resultant wave?
Decrease the amplitude
Increase the amplitude
Decrease the frequency
Increase the frequency
Standing waves are created by
Two identical waves reflecting off each other
Two identical waves being diffracted together
Two identical waves move through each other in opposite directions
Two identical waves are diffracted from two identical sources
In the diagram which letters represent the nodes
A B C
A C E
B D
B D E
A C D
A violin string is of length 0.54 m and has a wave speed of 565 m/s along it. Calculate the frequency of the 5th harmonic.
1046 Hz
523 Hz
2615 Hz
1569 Hz
The moving black dot is located at a position called:
a node
an anti-node
an anti-amplitude
the downward dog
How many antinodes does this standing wave have?
5
6
7
8
The third harmonic on a string fixed at both ends shows
A wavelength and a half
Half a wavelength
Two wavelengths
A wavelength
A tuning fork is struck, and another tuning fork nearby starts to vibrate. This process illustrates the principle of:
reflection
destructive interference
resonance
refraction
As the difference between the frequencies of two guitar strings increases, the number of beats per second
increases
decreases
remains the same
Two tuning forks, one of 512 Hz and the other of 515 Hz are struck at the same time. The number of beats produced per second is:
1027
3
25,000
513
A student blows across the end of a tube that is open at both ends. If the wavelength of the first harmonic note produced is 1.4 meters, the length of the tube is:
2.8 m
14 m
0.70 m
0.35 m
Which wavelength is possible for a tube closed at one end and 2.0 m long to produce?
8 m
2 m
0.5 m
4 m
A tube open at both ends is resonating in the first harmonic to a tuning fork with a frequency of 686 Hz. If the temperature of the air is 20oC, what is the length of the tube?
2.0 m
0.50 m
4.0 m
0.25 m
What is the wavelength of the third harmonic of a tube, closed at one end, that is 15 cm long?
90 cm
20 cm
30 cm
15 cm
As the length of a vibrating string increases, the pitch of the sound produced will:
increase because the wavelength increases
decrease because the wavelength increases
increase because the wavelength decreases
decrease because the wavelength decreases
As the tension of a guitar string is increased, the pitch of the sound produced will:
increase because the wavelength of the wave in the string decreases
decrease because the wavelength of the wave in the string increases
increase because the speed of the wave in the string increases
decrease because the speed of the wave in the string increases
A tube that is open at both ends has a harmonic series that is most like that of a:
string that is tied down at both ends
tube that is open at one end and closed on the other
spring that is clamped at one end and tied to a thin string on the other
A tube is open at both ends and resonates at 600 Hz. If the tube is now closed on one end, the new resonant frequency will be:
600 Hz
300 Hz
200 Hz
900 Hz
A violin and a trumpet are both brought into a room much hotter than the one they were in. What will happen to their tuning?
The trumpet will go flat (lower in pitch) and the violin will go sharp (higher in pitch)
The violin will go flat (lower in pitch) and the trumpet will go sharp (higher in pitch)
The trumpet will go flat (lower in pitch) and the violin will stay tuned the same
The violin and the trumpet will both go flat (lower in pitch)
