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Earn 100

If a soap bubble expands, the pressure inside the bubble
(a)increases
(b)remains the same
(c)is equal to the atmospheric pressure
(d)decreases

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Important Questions on Properties of Bulk Matter
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A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the ball as a function of time is

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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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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:
