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NCERT 8th Class (CBSE) Science: Sound

Sound

Question: How is sound produced? Answer: Sound is produced by rapid to-and-fro movements called vibrations. Question: Distinguish between infrasonic and ultrasonic. Answer: Difference is as follows: Question: What do you mean by time period of a vibrating object? Answer: The time taken for one complete vibration or oscillation is called its time period. Question:What is …

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NCERT 6th Class (CBSE) Social Science: What is Government?

Media and Democracy

Question: Name some institutions that are part of the government. Answer: The Supreme Court, the Indian Railways, Bharat Petroleum. Question: List any two functions of the government. Answer: The government protects the boundaries of the country. It maintains peaceful relations with other countries. Question: What happens when someone commits a crime? …

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