Why does moisture gather outside a tumbler containing cold water?

1 Answer

Answer :

Answer: The water vapour in the air condenses on cooling and appears as droplets of water.

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Last Answer : Answer: In winter, the outside temperature is lower than that of water flowing out of the pump, and therefore, the water is warm. Whereas in summer, the outside temperature is higher than the water of the pump, and therefore, it feels cold.

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Last Answer : Answer: As the water evaporates from the open surface of a pond, heat is taken away in the process, leaving the surface cool.

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Last Answer : Answer: Because the density of kerosene is less than that of water. For the same reason cream rises in milk and floats at the top.

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Last Answer : Answer: The weight of the ice block is equal to the weight of the liquid displaced by the immersed portion of the ice.

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Last Answer : Answer: The weight of water displaced by an iron ball is less than its own weight, whereas water displaced by the immersed portion of a ship is equal to its weight (Archimedes? Principle).

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Description : Heavy water and hard water

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Last Answer : Ans. kidneys

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Description : Why does a swimming pool appear less deep than is actually is?

Last Answer : Answer: The rays of light coming from the bottom of the pool pass from a denser medium (water) to a rarer medium (air) and are refracted (bend away from the normal). When the rays return to the surface, they form an image of the bottom of the pool at a point, which is little above the real position.

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Last Answer : Answer: After a shower, the clouds containing water droplets act like a prism through which the white light is dispersed producing a spectrum.

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Description : Why does a man fall forward when he jumps out of a running train or bus?

Last Answer : Answer: He is in motion while in the train or bus. When he jumps out, his feet comes to rest while touching the ground but his upper portion which is still in motion propels him forward.

Description : Why does an electric bulb explode when it is broken?

Last Answer : Answer: The bulb encompasses partial vacuum and as it breaks, air rushes in causing a small explosion.

Description : Why does smoke curl up in the air?

Last Answer : Answer: Smoke contains hot gases which being lighter in weight, follows a curved path because of the eddy currents that are set up in the air.

Description : Why do we lean forward while climbing a hill?

Last Answer : Answer: In order to keeps the vertical line passing through our centre of gravity always between our feet, which is essential to attain equilibrium or stability.

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