Because metals expands when its temperature increases and according to the question the metal lid will also expand when t is put in hot water and the bottel can be oppened easily
An ordinary electric fan does not cool the air, it gives comfort in summer because it circulates the air only present in the room.due to this, evaporation takes place and we feel cool
.A sample of clay was partially dried. It was found to contain 50% silica and 7% water. The original clay contained 12% water. If x percentage of silica is present in the original sample then, determine the value of 10x.
Deduce an expression for the potential energy of a system of two point charges q1 and q2 located at position r1 and r2 respectively in an external field (E)
In active region of BJT output characteristics, collector current increases with collector-to-emitter voltage because width of __________.