#1. A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its: [2000]
#2. The tail of a comet is directed away from the sun because: [1997]
#3. Consider the following statements: [1996] A person in a spaceship located halfway between the earth and the sun will notice that the : 1. sky is jet black. 2. stars do not twinkle. 3. temperature outside the spaceship is much higher than that on the surface of the earth.
#4. Cryogenic engines find applications in :[1995]
