Waves Unit Test
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Question
The table below shows the speed of sound in water at different temperatures and salinities.
Speed of Sound in Water at Different Temperatures and Salinities
Temperature (°C) 0 10 20 30
Speed of sound in freshwater (ms
) 1,403 1,447 1,481 1,507
Speed of sound in seawater (ms
) 1,449 1,490 1,522 1,546
Which statement can be inferred about the speed of sound in freshwater and in seawater?
(1 point)
Responses
At 80°C, the speed of sound in freshwater and seawater will be the same.
At 80°C, the speed of sound in freshwater and seawater will be the same.
The speed of sound increases as the density of water increases.
The speed of sound increases as the density of water increases.
Both temperature and salinity decrease the speed of sound in water.
Both temperature and salinity decrease the speed of sound in water.
The speed of sound increases as the salinity of water decreases.
Both temperature and salinity decrease the speed of sound in water.
Two similar waves are traveling through the same medium. Wave A has a frequency that is 3 times that of wave B.
How do their wavelengths compare?
(1 point)
Responses
λA=13λB
lambda sub cap A is equal to 1 third lambda sub cap b
λA=19λB
lambda sub cap A is equal to 1 ninth lambda sub cap b
λA=λB
lambda sub cap A is equal to lambda sub cap b
λA=3λB
lambda sub cap A is equal to 3 lambda sub cap b
λA=13λB
In one or two sentences, make and justify a claim about two aspects of the picture that illustrate behaviors of light.
The picture is of mountian and trees with the refelction of them on the water below them.