I'LL MARK YOU BRAINLIEST IF YOU ANSWER THIS CORRECTLY
The speed of sound in air at 20 de...
I'LL MARK YOU BRAINLIEST IF YOU ANSWER THIS CORRECTLY
The speed of sound in air at 20 deg C. is approximately 340 m/s
True
False
Wave speed = wave frequency x wave length
True
False
Because f=1/period, wave speed = wavelength/period
True
False
What is the wavelength of a sound wave that has a speed of 340m/s and a frequency of 440 hz
0.773 m
149,600 m
1.29 m
What is the wave speed of a wave that has a frequency of 50 Hz and a wavelength of 2.0 m?
25 m/s
100 m/s
0.04 m/s
Answers: 1
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A6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400kg moving at -3.0m/s. what is their final velocity? +0.50 m/s -1.0 m/s +2.5 m/s -0.25 m/s
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Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.
Answers: 1
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15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.
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