What will happen to thermal condictivity of a substance if its thickness is doubled? also give reason.

What are the theoretical properties of a gas at a temperature of 0 kelvin?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

Which sound characteristic is not affected by the relative motion of an object