When thermal energy in a solid is increased, the change in state is called
I clear II sharp III poor IV dark
Which of the above happens when the hole of a pinhole camera is diminished?
A blacksmith heated a metal whose cubic expansivity is 3.9 x 10\(^{-6}\)K\(^{-1}\). Calculate the area expansivity.
If the displacement of a car is proportional to the square of time, then the car is moving with
