What are the advantages of the SI system? Select all that apply.

1.It is easy to change from one unit to another.

2.It allows scientists to compare experimental results.

3.It is based on inches and pounds.

4.All its units are based on the number 100

Select the atomic models that belong to the same element

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.

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation