the piece of wood will float with

The weight of an empty balloon on a spring balance is W1. The weight becomes W2 when the balloon is filled with air. Let the weight of the air itself be w. Neglect the thickness of the balloon when it is filled with air. Also neglect the difference in the density of air insider and [...]

A 20 N metal block is suspended by a spring balance. A beaker containing some water is placed on a weighing machine which reads 40 N. The spring balance is now lowered so that the blocks gets immersed in the water. The spring balance now reads 16 N. The reading of the weighing machine will [...]

A wooden block, with a coin placed on its top, floats in water as shown in the fig. the distance l and h are shown there. After some time the coin falls into the water, then A wooden block floats in water as shown in the fig. the distance l and h are shown there. [...]

A piece of wood is floating in water kept in a bottle. The bottle is connected to an air pump. Neglect the compressibility of water. When more air is pushed into the bottle from the pump, the piece of wood will float with A piece of wood is floating in water kept in a bottle. [...]