11) The earth satellite Aryabhatta was put in orbit by India on
a) April 19, 1975
b) January 26, 1979
c) October 20, 1978
d) November 14, 1976
12) The period of a geostationary satellite orbiting the earth over the equator is
a) 12 hours
b) 24 hours
c) 16 hours
d) 20 hours
13) The sun continuosly produces an enormous amount of energy. This is due to
a) bailing
b) chemical combustion
c) nuclear fusion
d) nuclear fission
14) The aneroid barometer uses
a) alcohol
b)distilled water
c) mercury
d) does not use any liquid
15) A device used to measure heights above sea level is known as
a) dilatometer
b) potentiometer
c) altimeter
d) anemometer
16) A rocket moves according to the principle of conservation
a) energy
b) mass
c) momentum
d) force
17) Rain drops are spherical in shape because of
a) surface tension
b) viscosity
c) atmospheric pressure
d) elasticity
18) The instrument used to measure atmospheric pressure is
a) Barometer
b) Pyrometer
c) Hydrometer
d) Eudiometer
19) The S.I. unit of pressure is
a) Dyne
b) Watt
c) Pascal
d) Jaule
20) Out of following which is the non-magnetic substance
a) copper
b) cobalt
c) nickel
d) iron