The relationship between speed of a wave w, frequency f and wavelength 
is
For the wave of our problem,
and f=60 Hz, so its speed is
For the wave of our problem,
Which shows one example of physical change and the one example of a chemical change?
1 answer:
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Given :
Initial velocity, u = 12.5 m/s.
Height of camera, h = 64.3 m.
Acceleration due to gravity, g = 9.8 m/s².
To Find :
How long does it take the camera to reach the ground.
Solution :
By equation of motion :
Putting all given values, we get :
t = 2.56 and t = −5.116.
Since, time cannot be negative.
t = 2.56 s.
Therefore, time taken is 2.56 s.
Hence, this is the required solution.