41. A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will
42. The magnitude of buoyant force depends on the ________ of the fluid.
43. A solid needle placed horizontally on the surface of the water floats due to
44. Purity of a metal can be determined with the help of
45. Buoyancy depends on
46. When a steel ball is placed on the surface of mercury, it does not sink because
47. Clouds float in the atmosphere because of their
48. When a ship enters the sea from a river
49. The apparent weight of a man in a lift is less the real weight when :
50. A balloon filled with hydrogen will
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