What is caused by the chemical weathering that leads to the breakdown of rocks? . . a. ice wedging. . b. thermal expansion. . c. exfoliation. . d. rusting. . e. abrasion.

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.