Physics Past Questions and Answers

If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

A certain radioactive source emits radiation that was found to be deflected by both magnetic and electric fields. The radiation is?

The inner diameter of a test tube can be measured accurately using a?

Two bodies have masses in the ratio3:1. They experience forces which impart to them, acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

Particles of mass 10\(^{-2}\)kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad\(^{-1}\). If the radius of the blade is 0.2m, the centripetal force is?