Answer:
Correct option is
A
450 V and 15 A
P
in
=I
p
V
p
⇒T
p
=
V
p
P
in
=
200N
3000W
=15A
Efficciencyofthetransformer
η=
P
in
P
out
=
V
p
I
p
V
s
I
s
⇒
100
90
=
3000
6V
s
V
s
=
100×6
90×5000
=450V
Hence,
option (A) is correct answer.
Answer:
A. The resonator behaves as a wave guide (a hollow pipe used as a transmission line). The characteristics of the pipe depend on the type of the wave to be transmitted.
Answer:
a. the force between them quadruples
Explanation:
The electrostatic force between two charges is given by
where
k is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the two charges
In this problem, the charges on both objects are doubled, so
While the distance does not change, so the new force will be
so, the force will quadruple.
Her magnitude of deceleration on the ice would be 15.126m/s
Answer:
the impulse experienced by the passenger is 630.47 kg
Explanation:
Given;
initial velocity of the car, u = 0
final velocity of the car, v = 9.41 m/s
time of motion of the car, t = 4.24 s
mass of the passenger in the car, m = 67 kg
The impulse experienced by the passenger is calculated as;
J = ΔP = mv - mu = m(v - u)
= 67(9.41 - 0)
= 67 x 9.41
= 630.47 kg
Therefore, the impulse experienced by the passenger is 630.47 kg
