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# grade11

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Steel balls sink in water but they don’t sink in mercury. Why?
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Steel balls sink in water but they don’t sink in mercury. Why?

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Does a ship sink more in river water or in sea water? Explain.
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Does a ship sink more in river water or in sea water? Explain.

#physicsquestions #grade11
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A body is moving in a circular path with constant speed. Is this motion a simple harmonic?
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A body is moving in a circular path with constant speed. Is this motion a simple harmonic?

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A cork is floating in water. What is the apparent weight of the cork?
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A cork is floating in water. What is the apparent weight of the cork?

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A pendulum clock is taken to moon. Will it gain or lose time?
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A pendulum clock is taken to moon. Will it gain or lose time?

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If a cork is released from the bottom of a jar filled with water, what will happen and why?
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If a cork is released from the bottom of a jar filled with water, what will happen and why?

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Why is the bottom of a ship made heavy?
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Why is the bottom of a ship made heavy?

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What are centre of buoyancy and metacentre?
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What are centre of buoyancy and metacentre?

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How will you make difference between density and specific gravity of a body?
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How will you make difference between density and specific gravity of a body?

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If the earth is struck by meteorites, the earth will slow down slightly. Why?
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If the earth is struck by meteorites, the earth will slow down slightly. Why?

#physicsquestions #grade11
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A dancer girl is rotating over a turntable with her arms outstretched. If she lowers her arms how does this affect her motion?
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A dancer girl is rotating over a turntable with her arms outstretched. If she lowers her arms how does this affect her motion?

#physicsquestions #grade11
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Suppose two forces act on rigid body and two forces have same magnitude but opposite direction. what conditions the body rotate?
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Suppose two forces act on rigid body and two forces have same magnitude but opposite direction. what conditions the body rotate?

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Why bridges are declared unsafe after a long use?
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Why bridges are declared unsafe after a long use?

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A fan with blades takes longer time to come to rest than without the blades. Why?
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A fan with blades takes longer time to come to rest than without the blades. Why?

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A rigid, lighter than air balloon filled with Helium cannot continue to rise indefinitely. Why?
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A rigid, lighter than air balloon filled with Helium cannot continue to rise indefinitely. Why?

#physicsquestions #grade11
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