Work, Power and EnergyHard
Question
Two spheres of the same material have radii 1 m and 4m and temperatures 4000 K and 2000 K respectively. The ratio of the energy radiated per second by the first sphere to that by the second is
Options
A.1 : 1
B.16 : 1
C.4 : 1
D.1 : 9
More Work, Power and Energy Questions
Two masses of 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their momenta is...In the following indicator diagram, the net amount of work done will be :-...An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the ran...A sample of 0.1 g of water at 100oC and normal pressure (1.013 ×105 Nm–2) requires 54 cal of heat energy to c...A rocket of mass 6 × 103 Kg is arranged to be released in the vertically upward direction. If the velocity of the g...