When hydrogen filled balloon rises high in the atmosphere:
A. It will expand
B. It will shrink in size
C. Its size will remain unchanged
D. Will depend on air pressure
A. It will expand
B. It will shrink in size
C. Its size will remain unchanged
D. Will depend on air pressure
A. Mud is a good conductor
B. Mud is a bad conductor
C. Mud is a neutral insulator by nature
D. Cooling in summers and sunlight coming through holes causes warming in winters
A. Water is good conductor of heat
B. Water has very high specific heat capacity
C. Water boils at a comparatively high temperature
D. Evaporation of water produces lot of cooling
A. prevents infrared ray’s radiation from sun teaching earth
B. prevents infrared ray’s reflected from earth from escaping earth’s atmosphere
C. prevents ultraviolet rays from sun
D. reflects back radio waves from sun
A. Conduction
B. Convection
C. Radiation
D. Heat energy
A. Motherland
B. Fatherland
C. Mainboard
D. Base-board
A. Newton’s first law of motion
B. Second law of motion
C. Third law of motion
D. Both first and second laws of motion
A. Hot air carries less moisture
B. Hot air can absorb moisture from the air rather quickly
C. High temperature of the air helps fast
D. Hot air carries much moisture
A. Steam can penetrate the sky
B. Steam is at lower temperature
C. Steam contains more energy than boiling water
D. Steam is at a higher pressure
A. Fall in earth’s temperature
B. Rise in earth’s temperature
C. Uniformity in earth temperature
D. None of the above