51. The modulus of elasticity for mild steel is approximately equal to
52. The Hooke's law is valid for
53. Gas thermometers are more sensitive than the liquid thermometers because the gases
54. What happens to a liquid, when the vapour pressure equals the atmospheric pressure?
55. If the temperature of a place increases suddenly, the relative humidity
56. The modulus of rigidity is the ratio of
57. The flux commonly used in brazing is
58. How many laws of physics are there?
59. Which physicists is the writer of the book 'A Brief History of Time'?
60. On which day 'National Science Day' is celebrated in India ?
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