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10 Physical Science Questions

Date Posted: 16/02/2020
Category: Science
Due Date: 17/02/2020
Instruction
Question-1 (Chapter-I) 1. How many steps are there in a scientific method and list all of them? 2. What are constellations? What is the name of North Star? Why does Polaris occupy such a central position? 3. What are Ptolemaic system and Copernican system? 4. Why the Earth is round? 5. What are spring tides and neap tides? Answer all the questions (each question carriers 1 point) Question- 2 (chapter-II) 1. What happens to the speed of an object as it falls freely? To its acceleration? 2.Every acceleration is the result of a force. Does every applied force produce an acceleration? 3. Distinguish between mass and weight. 4. If the moon were twice as far from the earth as it is today, how would the gravitational force it exerts on the earth compare with the force it exerts today? 5. A hole is bored to the center of the earth and a stone is dropped into it. How do the mass and weight of the stone at the earth's center compare with their values at the earth's surface?
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