A body is pulled on a horizontal surface with a rope inclined at 30º to the vertical. If the effective force pulling the body along the horizontal surface is 15N, calculate the tension on the rope.
Newton's law of cooling is valid only for a
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.
