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प्रश्न
What is meant by pressure? State its S.I. unit.
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उत्तर
Pressure is the thrust per unit area of the surface.
Its S.I. unit is 'newton per metre2' or 'pascal'.
संबंधित प्रश्न
State whether the following statement is true or false :
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Name the scientist who gave he magnitude of buoyant force acting on a solid object immersed in a liquid.
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
A piece of wood floats on water. The buoyant force on wood will be
Define the term Density of a substance.
Pressure at the free surface of a water lake is P1, while at a point at depth h below its free surface is P2. (a) How are P1 and P2 related? (b)Which is more P1 or P2?
Define upthrust and state its S.I. unit.
The S.I. unit of upthrust is :
You are provided with a hollow iron ball A of volume 15 cm3 and mass 12 g and a solid iron ball B of mass 12 g. Both are placed on the surface of water contained in a large tub.
- Find upthrust on each ball.
- Which ball will sink? Give a reason for your answer (Density of iron = 8.0 g cm-3)
Complete the analogy.
Downward force: Weight:: Upward force offered by liquid: _____
