# Physics H Chapter 25

Vibration
Source of all wave motion is
Period
Time need for a wave to make one complete cycle is it’s
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Wavelength
Distance between successive identical parts of a wave is called
Unit of frequency
The hertz is a
Transverse wave
Wave created by shaking a rope up and down
Sound
NOT a transverse wave
Longitudinal wave
Sound is an example of
Has all properties.
Longitudinal wave lacks which of the following properties
Node
Where can you touch a standing wave
All of the above
Standing waves can be set up
Higher
Bug jiggling up and down, frequency of the waves is
Decrease
As the sound of a car’s horn passes and recedes the pitch
Motion of the source or observer
Doppler effect is the change in observed frequency due to
Stays the same
When a sound source moves towards you, what happens to the wave speed?
Amplitude
Some of a waves energy is always being dissipated as heat. This will reduce the waves
8 m
Amplitude of a particular wave is 4.0 m. Top to bottom disturbance is
Gain time
When a pendulum clock is taken from sea level to the top of a high mountain it will
Halves
Double the frequency of a vibrating object it’s period
Shortens
Dip your finger more frequently the wavelength of waves
One wavelength
During a single period, the distance traveled by a wave is
Unchanged
If the child stands rather than sits, the time for a to-and-for swing is
Decreases
When the elevator is accelerating upward, the period of the pendulum
In the upper part
Horse would be able to run faster if most of the mass in its legs were concentrated
Shock wave is produced
When an airplane is flying faster than the speed of sound
Swept continuously behind a plane flying faster than the speed of sound
A sonic boom
Greater than speed of sound
Observer on the ground hears a sonic boom
Supersonic
Aircraft flies faster than the speed of sound is
Both A and B
Doppler effect occurs when a source of sound moves
Shorter
A sound wave that has a higher frequency has a wavelength that is
1/60 hertz
Frequency of the second hand on a clock is
5 m
Each wave has an amplitude of 2.5m. The resulting wave has an amplitude of
.10Hz
The period of an ocean wave is 10 seconds. What is the wave’s frequency?
0.70m/s
A certain ocean wave has a frequency of 0.07 hertz and a wavelength of 10 m. What is the wave’s speed?
0.25 hertz
A weight on the end of a spring bobs up and down one complete cycle every 4.0 seconds. Its frequency is
5 sec
A weight on the end of a spring bobs up and down one complete cycle every 5.00 seconds. Its period is
10 hertz
A weight suspended from a spring bobs up and back down again over a distance of 3 m in 10 sec. Its frequency is
2 hertz
A leaf on a pond oscillates up and down two complete cycles each second as a water wave passes. What is the wave’s frequency?
6m/s
A cork floating in a pool oscillates up and down three complete cycles in 1 second as a wave passes by. The wave’s wavelength is 2 meters. What is the wave’s speed?
2m/s
A wave travels an average distance of 6 meters in 3 seconds. What is the wave’s velocity?
1 m
A wave has two crests and two troughs each second. If the wave travels an average distance of 8 m in 4 sec, its wavelength is
1.5m
Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 200 megahertz is
5 m/s
A skipper on a boat notices wave crests passing the anchor chain every 6 s. The skipper estimates the distance between crests at 30 m. What is the speed of the water waves?
bow wave
V shaped pattern
interference
When two or more waves are at the same place at the same time, the resulting effect is

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