Answer:
emf will also be 10 times less as compared to when it has fallen 
Explanation:
We know, from faraday's law-

and 
So, as the height increases the velocity with which it will cross the ring will also increase. 
Given


Now, from 

From equation a and b we see that velocity when dropped from
is 10 times greater when height is 40
so, emf will also be 10 times less as compared to when it has fallen 
Explanation:
1st- states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction.
2nd- states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it. (most important law)
3rd- states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. (law of action/reaction)
The answer is 100 my nilla.
Well,
The outer core of the Earth is mostly composed of iron and nickel.
The correct option is C.
Answer:
The frequency of the beat is
Explanation:
From the question we are told that
The speed of the ride 
The frequency of the oboe is 
The temperature outside is 
Generally the speed of sound generated in air is mathematically evaluated as

Substituting value


The frequency of sound(generated by the musician on he park) getting to the musicians on the unicycle is mathematically evaluated as

substituting values

Since the musician on the park is not moving the frequency of sound (from the musicians riding the unicycle )getting to him is = 440Hz
The beat frequency these musician here is mathematically evaluated as
So