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प्रश्न
Why is the tip of an allpin made sharp?
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उत्तर
The tip of an allpin is made sharp so that large pressure is exerted at the sharp end and it can be driven into with less effort.
संबंधित प्रश्न
What is meant by the term ‘buoyancy’ ?
Define the term relative density of a substance.
Distinguish between density and relative density.
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?
A tall vertical cylinder filled with water is kept on a horizontal table top. Two small holes A and B are made on the wall of the cylinder, A near the middle and B just Below the free surface of water. State and explain your observation.
Complete the following sentence :
Pressure at a point inside the liquid is ...................... To its depth.
Two cylindrical vessels fitted with pistons A and B of area of cross-section 8 cm2 and 320 cm2 respectively are joined at their bottom by a tube and they are completely filled with water. When a mass of 4 kg is placed on piston A, Find:
- the pressure on piston A,
- the pressure on piston B, and
- the thrust on piston B.
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
What is the cause of upthrust? At which point can it be considered to act?
Write about buoyant force.
