21. Rate of doing work is called
22. The energy associated with motion is called
23. The boiling point of water decreases at higher altitudes is due to
24. At boiling point of liquids, its
25. Contact force is another name for ________
26. The rotational effect of a force on a body about an axis of rotation is described in terms of
27. At hill stations, the boiling point of water will be
28. Instrument used to measure the force and velocity of the wind is
29. When pressure is increased the melting point of ice
30. The wall of a dam is made thicker at the bottom than at the top because the pressure exerted by the water on the wall
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