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Syllabus

(a) cutting and piercing tools are made sharp.

(b) an egg sinks in fresh water but floats in highly salty water.

(c) pressure is more while a man is walking than while standing.res

(d) army tank rest upon a continuous chain.

(e) its easy to walk on sand with flat shoes than high heels shoes.

(f) railway tracks are laid on large sized concrete sleepers

what is difference between thrust

and pressure

A wooden block is half submerged in water.The weight of the wooden block in air is 100N.Find the least force required to submerge the wooden block completely?

about preesure

Half of a floating wooden block is under water. The weight of the block in air is 100N. What is the minimum downward force to be applied on the block to sink it completely?

what is the density of gold?and what is the density of silver?

^{-2 }and 2880 N-m^{-2}respectively on a surface.The area of contact of ^{0}C temperature volume of balloon filled with gas is 500ml. the stretching capacity of balloon is 3 times the volume of gas at one atmosphere.then the temperature above which balloon bursts.^{3}is completely immmersed in water of density 1000 kg/m^{3}. find the force of buoyancy on it .(given g=10m/s^{2})