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			Kinetic Theory of Gases Questions And Answers.  
		
  		   
          
		   
		       Exercise ::
		       Kinetic Theory of Gases
		   
		    
| 1. | The mass of the moon is 1% of the mass of the earth. The ratio of gravitational pull on moon and that of moon in earth will be ? | 
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		|  | A. | 1:1 | 
|  | B. | 1:10 | 
|  | C. | 1:100 | 
|  | D. | 2:1 | 
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			   |  | Answer:  Option  A | 
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|  | Explanation: | 
		    
		|  | Gravitational forces are mutually equal and opposite. | 
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			Published by:Michael Daani 
		 
| 2. | If the earth loses its gravity, then for a body ? | 
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		|  | A. | Weight becomes zero | 
|  | B. | Mass becomes zero | 
|  | C. | Neither mass nor weight is zero | 
|  | D. | Both mass and weight are zero | 
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			   |  | Answer:  Option  A | 
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|  | Explanation: | 
		    
		|  | Weight = mgAs g becomes zero, weight is zero. Mass is the quantity of matter which is independent of g.
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			Published by:Michael Daani 
		 
| 3. | A ball is dropped from a spacecraft revolving around the earth at a height of 120km. What will happen to the ball? | 
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		|  | A. | It will go very far in the space | 
|  | B. | It will move with the same speed tangentially to the spacecraft | 
|  | C. | It will fall down to the earth gradually | 
|  | D. | It will continue to move with the same speed along the original orbit of the spacecraft | 
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			   |  | Answer:  Option  D | 
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|  | Explanation: | 
		    
		|  | In the absence of external torque the ball will continue to move with the same speed along the original orbit of spacecraft. | 
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			Published by:Michael Daani 
		 
| 4. | The velocity with which a projectile must be fired so that it escapes the earth’s gravitational field doesn’t depend on? | 
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		|  | A. | Mass of the earth | 
|  | B. | Mass of the projectile | 
|  | C. | Radius of the orbit | 
|  | D. | Universal gravitational constant | 
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			   |  | Answer:  Option  A | 
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|  | Explanation: | 
		    
		|  | Escape velocity does not depend on the mass of the projectile. | 
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			Published by:Michael Daani 
		 
| 5. | The escape velocity of a projectile from the earth is approximately? | 
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		|  | A. | 7km/sec | 
|  | B. | 11.2km.sec | 
|  | C. | 112km/sec | 
|  | D. | 1.1km/sec | 
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			   |  | Answer:  Option  B | 
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|  | Explanation: | 
		    
		|  | From the earth’s surface,ve=√2gR=11.2km/sec.
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		    |  | Tutorial Link: | 
		
		
			Published by:Michael Daani