Ch. 12 Flashcards
The spreading apart of particles
Rarefaction
When dealing with a pendulum, what is it called when the pendulum is hanging straight down?
Rest position
What is the matter through which waves travel from place to place
Medium
The motion that repeats at a constant rate is
Periodic motion
What is the natural folding or flowing or waves around the corner
Diffraction
Both field and contact forces can do work.
True
Periodic motion is rare in nature.
False
All periodic motion can happen in a vacuum.
False
All periodic motion can be expressed in terms of circular motion.
True
No damping occurs in an ideal periodic motion.
True
Damping affects mainly the amplitude of a periodic system.
True
All restoring forces are field forces.
False
Transverse waves and longitudinal waves’ crest and troughs are identical.
False
The mass of a pendulum’s weight affects its period.
False
The pendulums period is affected by the length of the arm.
True
In mechanical waves, matter more over great distances with the wave.
False
For any wave, the distance between two crests is the same as the distance between the two troughs.
True
Water particles in a wave of water may move in circular patterns.
True
Sund waves are good examples of transverse waves.
False
Nearly all waves can experience reflection and refraction.
True
Only two waves can interfere at one time.
False
Only transverse waves experience interference.
False
A standing wave does not move.
False
Beats have lower frequency than the interfering waves that form them.
True
Sound waves, like light waves, can have “shadows.”
True
The amplitude of a sound wave determines its pitch.
False
Only sound waves exhibit the Doppler effect.
False
Which of the following is not an example of periodic motion?
A car traveling down a straight road
Increasing the mass of vibrating object will
Increase its period
What force does not act on a pendulum?
Mass
To shorten the period of a pendulum
Decrease the length of the arm
All waves transmit
Energy
Which is the best description for vibrational waves that travel down a string?
Transverse
Which is the best description for earthquake waves?
Both longitudinal and transverse
A wave travels down a stretch string to the end where it is fixed to a will. What happens to the wave?
It is reflected
After two waves collide, they
Move on independently
While in the front yard, you can hear your dog barking in the backyard. This situation illustrates that Lund waves can
Diffract
A jet fighter approaches, pass low overhead, and flies away. How does the pitch of the engine when it is overhead compare to when it was approaching
Lower
The fastest waves in the universe are ______________ waves.
Electromagnetic
Repetitive motion can be classified as either __________ or __________.
Oscillations
Vibrations
In periodic motion the opposite of damping is _________.
Resonance
A single wave cycle or very short burst of waves is called a
Pulse
What is the period of the earth’s rotation on its axis?
24 hours
What is the SI unit for frequency?
Hertz (Hz)
What is the symbol that represents wavelength
Lambda
F= 1/T
Frequency
T= 2pi sqr route or I/g
Period
v= 2lmbda f
Wave speed
