?If there were no atmosphere, the length of the day on the earth will
1). ?decrease
2). ?increase
3). remain the same
4). ?none of these
1. The heat transferred by the radiator of arefrigerator is
2. Optical fibers are based on the phenomenon of
4. Earliest thermometer was developed by
5. When heated from 0℃ to 10℃ volume of a given mass of water Will
6. Resistance of human body in dry condition
7. In a Laser (say neon laser) all the atoms emit the light waves of
8. The passage of an electric current through a conducting liquid causes ___________.
9. Instrument used for measuring specific gravity is called _____.
10. The snow on the mountains does NOT melt all at once when it is heated by the sun because: