When a person whirls a rock on the end of a string and maintains it in uniform circular motion, the force exerted on the rock is most accurately referred to as?

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Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?

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What is frequency of sound in air?

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The light in vehicle become dim when it is starting,why?

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How d o the radio-waves pass through walls ?

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For projectiles fired at identical speeds but various angles from the ground, neglecting air resistance and the curvature of the earth, at what angle will the maximumhorizontal distance be attained?

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Explain big bang theory?

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Explain the Compound microscope ?

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Why is it that sound waves are not normally considered as having particle-like properties, nor raindrops as having wave-like properties? : quantum physics

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A man asks his friend to meet him at the airport at 3.00pm,to drive him to an appointment.he catches an earlier plane,and arrives at the airport at 2.00pm.he decides to start walking and is picked up en route by his friend.he arrives twenty minutes early for his appointment.how long did he walk?

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For measuring weight of 2cm3 piece of density 4gm/cm3 which spring balance is best suited what is the range and least count how we calculate

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Explain what is the direction of null vector?

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