A person uses a pulley to raise a flag up a 15 meter flagpole. The weight of the flag is 45 Newtons. The person pulls down on the rope with a force of

50 Newtons through a distance of 15 meters.

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.