A satellite revolves round the earth. Air pressure inside the satellite is maintained at 76cm of mercury. What will be the height of mercury column in a barometer tube 1m long placed in the satellite?

A satellite revolves round the earth. Air pressure inside the sat…

Can two streamlines cross each other, why?

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Why is the dome of water reservoir thick at the bottom?

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A one meter long glass tube is open at both ends. One end of the tube is dipped into a mercury cup, the tube is kept vertical and the air is pumped out of the tube by connecting the upper end to a suction pump. Can mercury be pulled up into the pump by this process?

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Can acceleration be produced without doing any work? Give example.

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A rectangular brick is kept on a table with a part of its length projecting out. It remains at rest if the length projected is slightly less than half the total length but it falls down if the length projected is slightly more than half the total length. Give reason.

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A ball is moved on a horizontal table with some velocity. The ball stops after moving some distance. Which external force is responsible for the change in the momentum of the ball?

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Can we boil water inside in the earth satellite?

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Will the acceleration of a wire be greater when the accelerator is pushed towards the floor or when the brake pedal is pressed hard?

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Why wheels are made circular in automobiles?

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A fan with copper winding in its motor consumes less power as compared to an otherwise similar fan aluminium winding. Explain.

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