10 kişilik bir sınıfta bir başkan bir başkan yardımcısı kaç farklı şekilde seçilebilir?​

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

The excretory system,need answers for all: )

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.