Heat from the sun reaches earth through vacuum.Name the mode of heat transfer in the above case

"Ozone layer does not permit infrared radiation from the sun to reach the earth". State whether this statement is true or false.

In a Class seminar, Varun says that some scientists believe that the life originated form the spores reached on earth from outer space. Name this theory of origin of life.

Earth satellites are object which revolve around the earth. consider a satellite at a height 'h' from the surface of the earth. obtain an equation for the period of above satellite.

A rocket is fired from the earth towards the Sun. At what distance from the earth's center is the gravitational force on the rocket zero? Mass of the Sun=2×10^30kg , Mass of the earth=6×10^24kg . Neglect the effect of the other planets etc. ( Orbital radius=1.5×10^11m )

On passing CO_2 through clear lime water, it turns milky. What is the reaction in the above case?