Answer:
Height of the racket ball = 0.86 m
Explanation:
Given:
Speed of the tennis ball,
= 31 m/s
Distance covered, 
= 13.3 m
We have to find the height of the racket ball when it left the racket.
Lets say that the time taken by the ball to hit the court be 't' seconds.
⇒ 
⇒ 
⇒ 
⇒ 
seconds
Now we have to find the height lets say that the height is 'h' meter.
⇒ 
...<em>second equation of motion</em>
⇒ 
<em>...initial velocity = 0 and acceleration = gravity </em>
⇒ 
⇒ 
⇒ 
meter.
So the height of the racket ball when it left the racket is of 0.86 m.
The metric unit is the Newton (N), or the
Evidence of radioactivity
The answer should be D. All three.
Answer:
Capacitance of the capacitor = 0.547 F
Explanation:
We charge of capacitor,
Q = CV
Let Q be the initial charge,we have voltage = 84 V
Q = C x 84 = 84 C
We have final charge = Q + 20.25 and voltage = 121 V
Q + 20.25 = 121 C
Substituting Q value from previous equation
84 C + 20.25 = 121 C
37 C = 20.25
C = 0.547 F
Capacitance of the capacitor = 0.547 F
