61.  Cryogenic Science is related to -

Answer & Explanation
Lower temperature

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

Answer & Explanation
Bragg Spectrometer

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

Answer & Explanation
Both Longitudinal and transverse waves

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

Answer & Explanation
Infrared Rays

65.  Time period of second pendulum is -

Answer & Explanation
2 sec

66.  Ice is packed in sawdust because -

Answer & Explanation
Sawdust is a poor conductor of Heat.

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

Answer & Explanation
Black and Rough

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

Answer & Explanation
Simple Harmonic Motion

69.  Water is used in Heated water polyethenes because -

Answer & Explanation
Its specific Heat is more.

70.  Temperature inversion is -

Answer & Explanation
Positive Lapse Rate

71.  To measure very High temperature we use -

Answer & Explanation
Thermo electric pyrometer

72.  Minimum temperature is measure by -

Answer & Explanation
Alcohol Thermometer

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

Answer & Explanation
Non-luminous zone

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

Answer & Explanation
Disinfectant

75.  Heat stored in water vapors is -

Answer & Explanation
Latent Heat
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