kordejah348
17.05.2021 •
Physics
What is the temperature if a sound wave has a frequency of 300hz and a wavelength of 1m?
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Ответ:
The parachute to open in 15 sec.
Explanation:
Given that,
Velocity = 120 km/hr
Height = 1000 m
If his parachute must open 500. m above the ground.
We need to calculate the time for parachute to open
Using formula of time
Where, d = distance
t = time
v = velocity
Put the value into the formula
Hence, The parachute will be open in 15 sec.