Physics Past Questions and Answers

The force with which an object is attracted to the earth is called its

The refractive index of liquid is 1.5. If the velocity of light in vacuum is 3.0 x 10<sup style='font-size: smaller;'>8</sup>ms<sup style='font-size: smaller;'>-1</sup>, the velocity of light in the liquid is

If relative density of a metal is 19, what will be the mass of 20cm<sup style='font-size: smaller;'>3</sup> of the metal when immersed in water?

Which of the following statements is true about liquid pressure is NOT correct? The pressure

A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms <sup style='font-size: smaller;'>-1</sup>, how much closer is the ship to the cliff?