PHYSICS    
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2. Which engine works on an external combustion? *
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24. The rate at which work is being done is known as – *
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3. Among these which type of radiation Is more harmful to humans? *
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6. What is the unit for measuring sounds? *
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4. What is the study of an object system that moves? *
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21. Which instrument is used to measure the blood pressure of a man? *
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10. What is the rate of change of distance know as? *
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9. Which is the major source of energy around the world? *
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20. Which among these expands the most when heated? *
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1. Name the study of mechanisms & rates of chemical reactions – *
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23. What is the international system (SI) unit of mass (Volume)? *
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13. In which of these state of matter the sound travels fast? *
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11. What among these are the good conductors of heat & electricity? *
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18. Which among these is a non-renewable resource of energy? *
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22. A wire with high resistance & low melting point is used in- *
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25. An electric device that converts an alternating current (AC) into a direct current (DC) is knows as – *
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17. Which among these is not a form of mechanical energy? *
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8. What is the speed of sound in the air? *
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14. What is the force exerted on an object by gravity called? *
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16. Which form of energy is produced by the motion of molecules? *
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12. What is the speed of light in vacuum? *
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5. What kind of energy does water filled in the reservoir of a dam have? *
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15. What kind of turbine engines are used to drive ship’s propellers? *
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7. What do you normally use to lubricate a machine? *
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19. How a radiator is helpful to an automobile’s engine? *
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