Answer:
(a) 294 J
(b) 229591.84 kg
Explanation:
height, h = 30 m
g = 9.8 m/s^2
(a) U = m x g x h
U = 1 x 9.8 x 30
U = 294 J
(b) Let the mass of water is m
U = m x g xh
80% of this energy per second is generating power
0.8 x m x 9.8 x 30 = 54 x 10^6
m = 229591.84 kg
Thus, the mass of water required is 229591.84 kg.
Answer:
Explanation:
Velocity of a wave is describe as
velocity =Frequency × Wavelength
Mathematically
v = fλ
Hence, Frequency, F = v / λ
Wavelength λ = v/f
So, if the frequency is kept constant, wavelength of the wave becomes directly proportional to velocity of the wave.
And this implies that, as the speed double, the wavelength is double.
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Sometimes in the same direction but most of them go in the opposite direction
Recall that
where 
and 
are the lion's initial and final vertical velocities, 
is its acceleration, and 
is the vertical displacement.
At its maximum height, the lion has 0 vertical velocity, so we have
where <em>g</em> is the acceleration due to gravity, 9.80 m/s², and we take the starting position of the lion on the ground to be the origin so that 
.
Let <em>v</em> denote the initial speed of the jump. Then
