A. same as that of sound
B. same as that of elastic waves
C. same as that of light 
D. more than light

A. gamma rays
B. beta particles
C. alpha particles
D. neutrons

A. of adhesion
B. of the gravitational force
C. of the pressure from all sides
D. the liquid tends to have minimum surface area due to surface tension

A. Highly penetrating X-rays
B. A beam of fast moving neutron rays
C. A beam of monochromatic coherent light
D. A beam of monochromatic incoherent light

A. cohesion and gravity
B. adhesion and surface tension
C. gravity only
D. surface tension only

A. Fusion of heavy nuclei
B. Fusion of light nuclei
C. Chemical reaction
D. Fission of heavy nuclei

A. centrifugal force
C. cohesive force
B. centripetal force
D. dsintegrating force

A. lakes of lava that got trapped beneath the earth
B. various chemicals that acted on each other under the weight of overground earth
C. ancient trees and plants
D. lava

A. oil
B. natural gas
C. coal
D. atomic energy

A. gases decreases and liquid increases
B. gases increases and liquids decreases
C. both gases and liquids increases
D. both gases and liquids decrease