A. The tungsten filament evaporates and collects there
B. Glass undergoes a change due to the heat
C. The heat of the bulb scorches the glass at the top
D. Dust inside the bulb condenses on the top
A. 10,000
B. 1,00,000
C. 2,00,000
D. 1,50,000
A. Nuclear fusion
B. Spontaneous fission
C. Controlled chain reaction
D. Uncontrolled chain reaction
A. Gravitational pul
B. Rotation of the earth
C. Revolution of the earth
D. Uneven heating of the earth
A. 1000 cubic feet of air for every 10 minutes
B. 1000 cubic feet of air for every 20 seconds
C. 1000 cubic feet of air for every 20 minutes
D. 1000 cubic feet of air for every 10 seconds
A. Carbonates absorbed from soil
B. Carbon dioxide
C. Oxides of minerals
D. Water
A. It becomes very hard
B. It reflects most of the heat from the sun
C. It has a low specific heat capacity
D. It has a high latent heat of fusion