How do the size of the inner planets compare the size of our outer planets

What provides structure to the human body?

Calculate the number of moles of ethane in 100 grams

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.