41. In the given physical quantities which is not a relative quantity?
42. Which one of the following can be used to measure temperature above 1500°C?
43. Which of the following is not correctly matched
44. Which of the following has both direction and magnitude?
45. The SI unit of sound wave frequency was named in honour of which physicist?
46. Which of the following units is used to measure the intensity of sound?
47. Micron is equal to
48. The strength of winds is measured with the help of
49. The unit of pressure is
50. 1 atmosphere = ?
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