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# discuss

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What is the physical meaning of emissivity? Write it’s unit

What is the physical meaning of emissivity? Write it’s unit

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How will you justify that stone is more rigid than iron?

How will you justify that stone is more rigid than iron?

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Do you think taking a picture of the woman was a good idea in story “The Loving Mother”?

Do you think taking a picture of the woman was a good idea in story “The Loving Mother”?

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Why an astronaut in a space capsule orbiting the earth experiences a feeling of weightlessness?

Why an astronaut in a space capsule orbiting the earth experiences a feeling of weightlessness?

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Why is the bottom of a ship made heavy?

Why is the bottom of a ship made heavy?

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A helium filled balloon rises to a certain height and then halts. Why?

A helium filled balloon rises to a certain height and then halts. Why?

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What will happen to the value of ‘g’ if the earth stops rotating?

What will happen to the value of ‘g’ if the earth stops rotating?

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Why does ice float in water?

Why does ice float in water?

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The occupants of the car are more likely to be hurt than the truck driver in crash. Why?

The occupants of the car are more likely to be hurt than the truck driver in crash. Why?

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Explain why the moon has no atmosphere?

Explain why the moon has no atmosphere?

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Explain how Newton’s first law of motion follows from the second law.

Explain how Newton’s first law of motion follows from the second law.

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What is meant by elastic and inelastic collision?

What is meant by elastic and inelastic collision?

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Differentiate between conservation of kinetic energy and conservation of linear momentum

Differentiate between conservation of kinetic energy and conservation of linear momentum

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Why is the kinetic friction less than the limiting friction?

Why is the kinetic friction less than the limiting friction?

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

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

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