I literally looked everywhere for the answer, and I still found nothing. I hope you get it right. Sorry.
Answer:
Now, think on the electrons flowing through a conductor (we can think on the resistor as a simple conductor, like a piece of metal)
Inside the conductor, we have some "fixed" (they do not flow with the current) electrons, such that as the current flows in the conductor, the flowing electrons can interact with the fixed ones in the conductor. Then we can have collisions inside the conductor.
In those collisions, the flowing electrons leave energy in the conductor, and as we know, heat is a form of energy. Then when we have a lot of these collisions, the temperature of the conductor increases.
That is why electronic devices get hot.
Also, as the temperature of a conductor increases, the electrons inside of it start to move more, then the probability of an interaction with the flowing electrons increases.
Answer:
First one,
Its because
Downward force must greater to uplift its weight.
From 3rd law of motion
answer
Height at which kiwi reach=1.2m
Solution
In this question we have given
mass of apple, 
mass of kiwi,
height from which apple is dropped,
Let the height at which kiwi reached is 
here,
We will apply law of conservation of energy
it means,
potential energy of kiwi= potential energy of apple
......(1)
here g is gravitational acceleration
put values of 
and 
in equation 1
therefore, Height at which kiwi reach=1.2m
