Physics, 13.02.2020 02:07 maribel2421
The highest frequencies humans can hear is about 20000 Hz. What is the wavelength of sound in air at this frequency? The speed of sound is 340 m/s.
Answers: 1
Physics, 21.06.2019 23:00, blackwell0315
1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s
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Physics, 22.06.2019 15:30, tamaraquirozmorales
Can you match these to the correct definition
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Physics, 22.06.2019 16:00, Nigward666
The solid that is formed and usually sinks to the bottom of a solution is the
Answers: 2
The highest frequencies humans can hear is about 20000 Hz. What is the wavelength of sound in air at...
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