91 .X- rays are â€¦â€¦â€¦. waves.
92 .The velocity of sound in moist is more than in dry air because the moist air has
93 .The method of age determination called 'radioactive uranium dating' cannot be used to determine the age of
94 .Which of the following is a primary consumer?
95 .SI unit of luninious intensity is:
96 .Which one among the following rroups is the most abundant in terms of number os species identified?
97 .Sound waves are similar to the waves
98 .The image of our face in a plane mirror
99 .Which one of the following phenomena is used in optical fibres?
100 .The shape of a rain drop is spherical due to-
101 .The value of g on the Earth's surface changes due to
102 .The Doppler's effect is applicable for
103 .Sound moves with higher velocity if
104 .Î³- ray consists of:
105 .A reversible and an irreversible engine are working between the same limits of temperature. The efficiency of