Advertisements
Advertisements
प्रश्न
Why does a block of wood held under water rise to the surface when released ?
Advertisements
उत्तर
A wooden block held under water floats on the surface on release because it is less dense than water. A substance floats if it is less dense than the fluid in which it is immersed after the external force is withdrawn from it.
APPEARS IN
संबंधित प्रश्न
Relative density of a substance is expressed in g cm-3.
A body while floating sinks deeper in a liquid of low density than in a liquid of high density.
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
The buoyant force experienced by a body when floating in saltwater is ....... to or same that of when floating in pure water.
The weight of a body is more than the buoyant force experienced by it, due to a liquid. The body will
Deduce an expression for the pressure at depth inside a liquid.
Complete the following sentence :
Pressure of a liquid at a given depth is .................. To the density of the liquid.
Figure shows the same block of wood floating in three different liquids A, B and C of densities ρ1, ρ2 and ρ3 respectively. Which of the liquid has the highest density? Give a reason for your answer.
A balloon filled with helium gas floats in a big closed jar which is connected to an evacuating pump. What will be your observation, if air from the jar is pumped out? Explain your answer.
Consider the statement given below and choose the correct option.
Assertion: Water strider slides easily on the surface of the water.
Reason: Water strider experiences less buoyant force.
