Question

Which phrase correctly defines the amplitude of a wave?(1 point)

the horizontal distance from the crest of one wave to the crest of the next wave.

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 vertical distance from the crest or trough of a wave to the equilibrium
A sound wave passes through regions of the ocean with varying densities. How do the varying wavelengths correspond to the density of the water? Select two correct answers(2 points)

Longer wavelengths correspond to lesser density of the water

shorter wavelengths correspond to lesser density of the water

longer wavelengths correspond to greater density of the water

shorter wavelengths correspond to greater density of the water
(1 point)

0.8 seconds

0.2 seconds

5 seconds

2 seconds
Two waves are traveling at the same speed. Wave A has a frequency that is 3 times that of wave B. How do their wavelengths compare?(1 point)

Wave A = 1/3 of Wave B

Wave A = 3 times more than Wave B

Wave A = Wave B

Wave A = 1/9 of Wave B
(1 point)

17 m

6,800 m

0.059 m

170 m
(1 point)

wavelength of the stationary source: 13.25 ft; perceived wavelength: 11.25 ft

wavelength of the stationary source: 11.25 ft; perceived wavelength: 9.25 ft

wavelength of the stationary source: 11.25 ft; perceived wavelength: 13.25 ft

wavelength of the stationary source: 9.25 ft; perceived wavelength: 11.25 ft

Answer 1

Here are the answers I can determine from the information given:

1) Definition of amplitude
- Correct: "the vertical distance from the crest or trough of a wave to the equilibrium."

2) Sound wave / density (pick two)
- Correct: "Longer wavelengths correspond to lesser density of the water."
- Correct: "Shorter wavelengths correspond to greater density of the water."

3) Two waves same speed, fA = 3 fB — wavelength comparison
- Correct: "Wave A = 1/3 of Wave B."

For the following sets of answer choices you posted, the question text is missing, so I can't pick the correct choice without more info:
- (0.8 s / 0.2 s / 5 s / 2 s)
- (17 m / 6,800 m / 0.059 m / 170 m)
- The Doppler-style choices with wavelengths in feet (which pair is stationary vs perceived)

If you paste the full questions for those items (or give the frequency, speed, source/observer speeds, number of cycles, etc.), I’ll pick the correct answers and show the work.