61.  Cryogenic Science is related to -

62.  The device used for measuring the wavelength of X-rays is:

63.  When a stone is thrown is calm water of a pond wave produced are-

64.  Ultra violet radiations has more energy as compare to -

65.  Time period of second pendulum is -

66.  Ice is packed in sawdust because -

67.  A Body absorb Maximum amount Heat, when it is-

68.  What is the motion which repeated in self after a regular interval of time?

69.  Water is used in Heated water polyethenes because -

70.  Temperature inversion is -

71.  To measure very High temperature we use -

72.  Minimum temperature is measure by -

73.  The Hottest part of Gas Flame is known as - [

74.  Ultraviolet rays can be used in water treatment as--

75.  Heat stored in water vapors is -