1.Causes of water pollution.
2.WHAT IS THE CAUSE OF FRICTION BETWEEN TWO SURFACES IN CONTACT
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It is the force that opposes relative motion or tendency of relative motionbetween two surfaces in contactrepresented by f. ... Because of thisfriction force is called a self adjusting force. Earlier, it was believed thatfriction was caused due to the roughness of the two surfaces in contact with each other.
It is the force that opposes relative motion or tendency of relative motionbetween two surfaces in contactrepresented by f. ... Because of thisfriction force is called a self adjusting force. Earlier, it was believed thatfriction was caused due to the roughness of the two surfaces in contact with each other.
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