When the string on a violin vibrates, waves move in both directions along the string, interfering with each other. Sometimes these waves interact to make nodes and antinodes. What are these kinds of waves called?(1 point)
Responses
frequency waves
frequency waves
electromagnetic waves
electromagnetic waves
superposition waves
superposition waves
standing waves
standing waves
Which phrase correctly defines the amplitude of a wave?(1 point)
Responses
the vertical distance from the crest or trough of a wave to the equilibrium
the vertical distance from the crest or trough of a wave to the equilibrium
the vertical distance from the trough of a wave to the crest
the vertical distance from the trough of a wave to the crest
the horizontal distance from the trough of one wave to the trough of the next wave
the horizontal distance from the trough of one wave to the trough of the next wave
the horizontal distance from the crest of one wave to the crest of the next wave
the horizontal distance from the crest of one wave to the crest of the next wave
the vertical distance from the crest or trough of a wave to the equilibrium
The speed of a wave is
2
m
s
2ms, and its wavelength 0.4 meters. What is the period of the wave?(1 point)
Responses
2 seconds
2 seconds
5 seconds
5 seconds
0.2 seconds
0.2 seconds
0.8 seconds
0.2 seconds
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 (
m
s
ms)
1,403
1,447
1,481
1,507
Speed of sound in seawater (
m
s
ms)
1,449
1,490
1,522
1,546
What is the speed of sound in freshwater at a temperature of 10°C?
1,447 m/s
Which statement can be inferred about the speed of sound in freshwater and in seawater?
(1 point)
Responses
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.
The speed of sound increases as the salinity of water decreases.
The speed of sound increases as the density of water increases.
The speed of sound increases as the density of water increases.
At 80°C, the speed of sound in freshwater and seawater will be the same.