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
A block of mass m = 0.1 kg is connected to a spring of unknown spring constant k. It is compressed to adistance x from r...At what temperature, the mean kinetic energy O2 will be the same for H2 molecules at -73oC :-...In the following indicator diagram, the net amount of work done will be :-...A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m which applying t...A bomb of mass 10 kg suddenly explodes in to two parts of masses 2 kg and 8 kg. If total 1500 J kinetic energy is produc...