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Questions and Answers
What is the velocity of a wave with a frequency of 3.1 Hz and a wavelength of 0.30 m/wave?
What is the velocity of a wave with a frequency of 3.1 Hz and a wavelength of 0.30 m/wave?
0.93 m/sec
What is the frequency of a wave with a velocity of 3.0 m/sec and a wavelength of 0.60 m/wave?
What is the frequency of a wave with a velocity of 3.0 m/sec and a wavelength of 0.60 m/wave?
5 Hz
What is the speed of sound in air at a temperature of 20°C?
What is the speed of sound in air at a temperature of 20°C?
343 m/sec
How long will it take an echo to return across a valley that is 36 m from one side to the other if the temperature is 25°C?
How long will it take an echo to return across a valley that is 36 m from one side to the other if the temperature is 25°C?
If an echo returns across a canyon in 0.31 seconds, what is the distance across the canyon if the temperature is 25°C?
If an echo returns across a canyon in 0.31 seconds, what is the distance across the canyon if the temperature is 25°C?
If a canyon is 67.0 m across, and it takes 0.400 seconds for an echo to return, what is the speed of sound at the current temperature?
If a canyon is 67.0 m across, and it takes 0.400 seconds for an echo to return, what is the speed of sound at the current temperature?
Flashcards
How do you calculate velocity?
How do you calculate velocity?
Velocity equals frequency times wavelength. (v = fλ)
How do you calculate frequency?
How do you calculate frequency?
Frequency equals velocity divided by wavelength. (F = v/λ)
What is the speed of sound in air at 20°C?
What is the speed of sound in air at 20°C?
Approximately 343 m/sec. The speed of sound increases with temperature.
What is the speed of sound in air at -5°C?
What is the speed of sound in air at -5°C?
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Echo return time across a valley depends on what?
Echo return time across a valley depends on what?
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What determines echo return?
What determines echo return?
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What helps calculate sound speed in a canyon?
What helps calculate sound speed in a canyon?
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Study Notes
- To find the velocity of a wave with a frequency of 3.1 Hz and a wavelength of 0.30 m/wave, use the formula v = fλ.
- The velocity of the wave is 0.93 m/sec.
- To find the frequency of a wave with a velocity of 3.0 m/sec and a wavelength of 0.60 m/wave, use the formula F = v/λ
- The frequency of the wave is 5 Hz.
- The speed of sound in air at a temperature of 20°C is 343 m/sec.
- The speed of sound in air at a temperature of -5°C is 328 m/sec.
- It will take 0.21 seconds for an echo to return across a valley that is 36 m from one side to the other if the temperature is 25°C.
- If an echo returns across a canyon in 0.31 seconds, the distance across the canyon is 54m if the temperature is 25°C.
- If a canyon is 67.0 m across, it takes 0.400 seconds for an echo to return, the speed of sound at the current temperature is 335 m/sec.
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