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Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The stretching of a spring is determined by the shear modulus of the material of the spring.
Reason (R): A coil spring of copper has more tensile strength than a steel spring of same dimensions.
In the light of the above statements, choose the most appropriate answer from the options given below :
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Important Questions on Properties of Bulk Matter
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The velocity of a small ball of mass and density , when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is , then the viscous force acting on the ball will be:
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A cup of coffee cools from to in , when the room temperature is . The time taken by a similar cup of coffee to cool from at a room temperature same at is :
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Three stars have surface temperatures respectively. Star A appears bluish, star appears reddish and star yellowish. Hence,
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A liquid does not wet the solid surface if angle of contact is:
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A barometer is constructed using a liquid (density ). What would be the height of the liquid column, when a mercury barometer reads
(density of mercury )
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A wire of length , area of cross section is hanging from a fixed support. The length of the wire changes to when mass is suspended from its free end. The expression for Young’s modulus is:
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The quantities of heat required to raise the temperature of two solid copper spheres of radii and through are in the ratio:
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A capillary tube of radius is immersed in water and water rises in it to a height . The mass of the water in the capillary is . Another capillary tube of radius is immersed in water. The mass of water that will rise in this tube is:
