Uniform solid sphere of radius r rotates about a diameter with an angular speed 536 radians/second. the sphere then collapses under the action of internal forces to a final radius r/2. what is the final angular speed of the sphere in radians/second?

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material