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Laws Governing Gravity :: Discussion

1.	1. Which of the following is true about the universe?
	A.	a) It is an open system
	B.	a) It is an open system
	C.	c) It is an isolated system
	D.	d) It is an international system

	Answer: Option C


	Explanation:
	Explanation: In spite of all the violent phenomenon occurring in this universe all the time, the total energy if the universe remains constant. The total energy remains constant only in an isolated system. Thus the universe is an example of an isolated system.



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Published by:Aleesha Hameed

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