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Mayank1444
@mayank1444
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Joined: Oct 11, 2021
Last seen: Nov 14, 2021
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Answer to: Why does a gunman get a jerk on firing a bullet?

Gunman gets a jerk on firing a bullet because when a bullet is fired from a gun, the force sending the bullet forward is equal to the force sending th...

4 years ago
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Answer to: To take the boat away from the bank of a river, the boatman pushes the bank with an oar. Why?

To take boat away from the bank of a river, the boatman pushes the bank with the oar. The bank exerts an equal and opposite force on the boat which ma...

4 years ago
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Answer to: Explain the meaning of the following equation: F = m x a where symbols have their usual meanings

Force is directly proportional to the product of ‘mass’ of the body and the ‘acceleration’ produced in the body by the action of force. F = m x a ...

4 years ago
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Answer to: To every action, there is an………………….. and…………………… reaction (b) Momentum is a…………….. Its emit is

(a) Equal; opposite (b) Vector; kg.m/s (c) Acceleration; rate; momentum (d) Magnitude; directions (e) Momentum; force

4 years ago
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Answer to: Name the physical quantity which makes it easier to accelerate a small car than a large car.

Less mass of the small car makes it easier to accelerate a small car than a large car because acceleration is inversely proportional to mass of the ca...

4 years ago
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Answer to: A girl weighing 25 kg stands on the floor. She exerts a downward force of 250 N on the floor. What force does the floor exert on her?

The force exerted by the floor on her = the downward force exerted by the girl = 250 N This is due to Newton’s third law of motion which states tha...

4 years ago
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Answer to: Find the acceleration produced by a force of 5 N acting on a mass of 10 kg.

Force F = 5 N Mass m = 10 kg Acceleration a = = = 0.5 m/s2

4 years ago
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Answer to: What is the force which produces an acceleration of 1 m/s^2 in a body of mass 1 kg?

Mass, m = 1 kg Acceleration, a = 1 m/s2 Force F = m x a = 1 x 1= 1N

4 years ago
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Answer to: Is the following statement true or false: A rocket can propel itself in a vacuum.

True, because rocket does not require air for obtaining uplift or for burning its fuel.

4 years ago
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Answer to: Name the principle on which a rocket works.

Rockets work on the principle of conservation of momentum.

4 years ago
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4 years ago
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Answer to: The largest tiger reserve in India is

Correct answer: (1) Nagarjunsagar-Srisailam

4 years ago
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Answer to: Acid rains are produced by

Correct answer: (2) excess emissions of NO2 and SO2 from burning fossil fuels

4 years ago
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Answer to: Biodiversity of a geographical region represents

Correct answer: (4) the diversity in the organisms living in the region.

4 years ago
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Answer to: Sacred groves are specially useful in

Correct answer: (3) conserving rare and threatened species.

4 years ago
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