The buoyant force on any object acts in the direction opposite to the force of gravity. <em>(A)</em>
A mirror is opaque you can not see through it but you can see a reflection within it
Answer:

Explanation:
Given that
Length = L
At initial over hanging length = Xo
Lets take the length =X after time t
The velocity of length will become V
Now by energy conservation

So

We know that



At t= 0 ,X=Xo
So we can say that

So the length of cable after time t

Answer:
D: X: Low potential energy
Y: High potential energy
Z: Flow of electrons
Explanation: trust