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Chapter 13 Sound

Last Updated on May 4, 2020 By Mrs Shilpi Nagpal Leave a Comment

Frequency

Class 8 | Science | Ch 13 |Friction| NCERT Solutions 1. Choose the correct answer. Sound can travel through (a) gases only (b) solids only (c) liquids only (d) solids, liquids and gases. Answer: (d) solids, liquids and gases 2. Voice of which of the following is likely to have minimum frequency? (a) Baby girl (b) Baby boy (c) A man (d) A woman Answer: (c) A … [Read more...] about Chapter 13 Sound

Chapter 12 Friction

Last Updated on May 4, 2020 By Mrs Shilpi Nagpal 2 Comments

Book moving downwards

Class 8 | Science | Ch 12 |Friction| NCERT Solutions 1. Fill in the blanks. (a) Friction opposes the _____________ between the surfaces in contact with each other. (b) Friction depends on the _____________ of surfaces. (c) Friction produces __________. (d) Sprinkling of powder on the carrom board ________ friction. (e) Sliding friction is ___________ than the static … [Read more...] about Chapter 12 Friction

Chapter 11 Force and Pressure

Last Updated on April 18, 2019 By Mrs Shilpi Nagpal

Class 8 | Science | Ch 9 |Force and Pressure| NCERT Solutions 1. Give two examples each of situations in which you push or pull to change the state of motion of objects. Answer: 1) If we kick a stationary football kept on the ground, then the football starts moving. The force of our foot makes the stationary football to move. 2) Take a rubber ball and place it on … [Read more...] about Chapter 11 Force and Pressure

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