Question 91. Diffusion of light in the atmosphere takes place due to

Question 92. Consider the following statements
1.Steam at 100°C and boiling water at 100°C contain same amount of heat.
2.Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3.In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct?

Question 93. Three identical vessels A, B and C are filled with water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first?

Question 94. A noise level of 100 decibel would correspond to

Question 95. Consider the following statements
1.If a person look at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2.If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?

Question 96. For which one of the following is capillarity not the reason?

Question 97. A 'black hole' is a body in space which does not allow any radiation to come out. This property is due to its  

Question 98. Consider the following statements An ordinary light bulb has a rather short life because the
1.filament wire is not uniform.
2.bulb cannot be evacuated completely.
3.wires supporting the filament melt at high temperatures.
Which of the above statements are correct?

Question 99. For reproducing sound, a CD (Compact Disc) audio player uses a

Question 100. The memory of a computer is commonly expressed in terms of kilobytes or megabytes. A byte is made up of