How much a transformer steps-up or steps-down the voltage is determined by the _________.
2 answers:
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Answer:
u=78.4m/s
Explanation:
A ball is thrown vertically upward, which is the positive direction.A little later it returns to its point of release.The ball is in the air for a total time of 8.0 s.What is its initial velocity? Neglect air resistance
from newtons equation of motion
s=ut
v=u+at
v=0 because at maximum height reached by the ball the ball stops moving
0=u-9.8*8
u=78.4m/s
u=initial velocity
v=final velocity
a=acceleration due to gravity, 9.81m/s^2
t=time it takes in air
s= distance to get to the maximum before returning
Answer:
Explanation:
Capacitance C is given by
A= area of capacitor cross section
d= distance
therefore,
A_1= πR^2
d_1= d
A_= π(2R)^2
d_2 = 2d
threfore
and
also we know that E= V/d
⇒
⇒
= A_1/A_2= =4
therefore,