Waves
A mechanical wave moves through a medium, which can be
a. liquid
b. solid
c. gas
d. all of the above
d. all of the above
To determine the speed of a wave, you would use which of the following formulas?
a. speed = frequency x amplitude
b. speed = wavelength x amplitude
c. speed = wavelength x frequency
d. speed = wavelength x period
c. speed = wavelength x frequency
A sound wave is an example of a
a. standing wave
b. longitudinal wave
c. transverse wave
d. surface wave
b. longitudinal wave
if a positive and negative electrical charge were brought near each other, they would
a. cause static discharge
b. have no effect on each other
c. repel each other
d. attract each other
d. attract each other
Energy from the sun reaches Earth mostly by
a. conduction
b. radiation
c. convection
d. thermal expansion
b. radiation
Which wave causes the medium to vibrate only in a direction parallel to the wave's motion?
a. transverse
b. longitudinal
c. surface
d. none of the above
b. longitudinal
To find amplitude, measure
a. from a trough to the rest position
b. from a crest to the rest position
c. neither A or B
d. either A or B
d. either A or B
Sonar equipment sends sound waves into deep water and measures
a. interference of the transmitted and reflected waves
b. the time delay of the returning echoes
c. only the direction of the reflected wave
d. refraction of the transmitted wave.
b. the time delay of the returning echoes
What type of current is produced by a battery?
a. parallel current
b. alternating current
c. direct current
d. potential current
c. direct current
How does reflection differ from refraction and diffraction?
a. reflection is the only process in which waves does not continue moving forward.
b. reflection is the only process that involves a change in the wave.
c. reflection affects all types of mechanical waves, but refraction and diffraction do not.
d. reflection is the only process that changes the direction of a wave
a. reflection is the only process in which waves does not continue moving forward.
a disturbance sends ripples across the water in a tub. These ripples are an example of
a. surface waves
b. rarefaction
c. longitudinal waves
d. compression
a. surface waves
When a wave strikes a solid barrier, it behaves like a basketball hitting a backboard. This wave behavior is called
a. constructive interference
b. diffraction
c. reflection
d. refraction
c. reflection
A piano, violin, or guitar uses the resonance of a wooden soundboard to
a. limit standing waves
b dampen the sound
c. raise the pitch
d. amplify the sound
d. amplify the sound
Which of the following materials allows charges to flow easily?
a. glass
b. wood
c. copper
d. fibers
c. copper
The part of the ear that sends coded nerve signals to the brain is
a. the outer ear
b. the inner ear
c. the middle ear
d. the eardrum
b. the inner ear
When a surfer rides an ocean wave on her surfboard, she is actually riding on
a trough of the wave
b the rest position of the wave
c. a crest that is toppling over
d. a region of rarefaction
c. a crest that is toppling over
For refraction to occur in a wave, the wave must
a. enter a new medium at an angle
b. strike an obstacle larger than the wavelength
c. change direction within a medium
d. enter a new medium head on
a. enter a new medium at an angle
Which part of the ear amplifies the vibrations from sound waves?
a. outer ear
b. inner ear
c. middle ear
d. both a and b
c. middle ear
An object that is accelerating may be
a. slowing down
b. gaining speed
c. changing direction
d. all of the above
d. all of the above
What distance can be most accurately measured with a ruler?
a. the length of a river
b. the width of a book
c. the distance between two cities
d. the size of an object under a microscope
b. the width of a book
A period is the length of time it takes for
a. one complete wavelength to pass a fixed point
b. a disturbance to start a wave
c. a wave to travel the length of a rope
d. two complete wavelengths to pass a fixed point
a. one complete wavelength to pass a fixed point
Suppose two waves collide and the temporary combined wave that results is smaller than the original waves. What term best describes this interaction?
a. constructive interference
b. standing wave formation
c. destructive interference
d. diffraction
c. destructive interference
An ambulance siren sounds different as it approaches you than when it moves away from you. What scientific term would you use to explain how this happens?
The Doppler Effect
What kind of friction occurs as a fish swims through water?
a. sliding
b. rolling
c. static
d. fluid
d. fluid
A person walks 1 mile every day for exercise, leaving her front porch at 9:00 am and returning to her front porch at 9:25 am. What is the total displacement of her daily walk?
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