Answer:
to absorb extra light- E.
The number of repetitions per second is called the frequency and is the inverse of the period. The period, T, is normally measured in seconds, and the frequency, ν, in Hertz. When the oscillations<span> (or vibrations) affect the material around them a </span>wave <span>is formed which transports energy away.</span>
h = average height of Niagara falls = 45 m
P = power generated by Stations I and II together = 1926 MW = 1926 x 10⁶ Watt
m = mass of water required to go over the falls
g = acceleration due to gravity
t = time = 1 sec
Power generated is given as
Power generated = potential energy lost/time
P = mgh/t
1926 x 10⁶ = m (9.8) (45)/1
m = 1926 x 10⁶ /(9.8 x 45)
m = 4.4 x 10⁶ kg
it is given that , 1 kg = 1 litre
hence
hence Volume of water = V = 4.4 x 10⁶ litre
Answer:1.549 kg-m/s
Explanation:
Given
mass of basketball =609 g
ball is moving downward right at an angle of 
with vertical
After hitting the floor it moves with a speed of 3 m/s
change in Momentum in x direction
where u=3m/s
v=3m/s
m=mass of ball
Change in momentum in Y-direction
Answer:
C. 100 ft/min
Explanation:
A scalar quantity has no direction.
A scalar with direction is called a vector.
