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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: State the law of conservation of momentum. (b) Discuss the conservation of momentum in each of the following cases: (i) a rocket taking off from ground. (ii) flying of a jet aeroplane.

(a) According to the law of conservation of momentum: When two (or more) bodies act upon one another, their total momentum remains constant (or con...

4 years ago
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Answer to: State Newton’s third law of motion and give two examples to illustrate the law. (b) Explain why, when a fireman directs a powerful stream of water on a fire from a hose pipe, the hose pipe tends to go backward.

(a) According to Newton’s third law of motion: Whenever one body exerts a force on another body, the second body exerts an equal and opposite force on...

4 years ago
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Answer to: Explain why, a cricket player moves his hands backwards while catching a fast cricket ball. (b) A 150 g ball, travelling at 30 m/s, strikes the palm of a player’s hand and is stopped in 0.05 seconds.

a) A player moves his hands backwards while catching a fast ball because a fast moving ball has a large momentum and in stopping this ball, its moment...

4 years ago
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Answer to: Climate of the world is threatened by

Correct answer: (1) Increasing amount of atmospheric carbon dioxide

4 years ago
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Answer to: Measuring Biochemical Oxygen Demand (BOD) is a method used for

Correct answer: (2) estimating the amount of organic matter in sewage water.

4 years ago
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Answer to: Secondary sewage treatment is mainly a

Correct answer: (3) biological process

4 years ago
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4 years ago
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Answer to: "Good ozone" is found in the

Correct answer: (1) stratosphere

4 years ago
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4 years ago
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Answer to: Stirred tank bioreactors have been designed for

Correct answer: (3) availability of oxygen throughout the process

4 years ago
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Answer to: Which one of the following expanded forms of the following acronyms is correct?

Correct answer: (3) IUCN = International Union for Conservation of Nature and Natural Resources

4 years ago
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