41. Insects can move on the surface of water without sinking due to
42. In cold weather, aquatic animals survive even when water at the top layer of the lake freezes into ice because
43. The size of the Respirable Suspended Particulate Matter (R.S.P.M.) in air is
44. A body is just floating in a liquid if the body is slightly pressed down and released. It will
45. Two pieces of different metals, when completly immersed in water, experience equal upthrust, then
46. The relative density of silver is 10.8. The density of water is 103kgm-3. What will be the density of silver in SI unit.
47. Which of the following increases when the pressure exerted by a solid decreases-
48. When the temperature increases, the angle of contact of liquid
49. When a cork and a iron nail are placed in a beaker filled with water, the cork floats while the iron nail is submerged.
What is the reason behind it?
What is the reason behind it?
50. The rain drops are spherical because
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