Can ultraviolet rays be felt by your skin but can not be seen by your eyes? if not then what is it

If a solution had a ph of 7 what is the solution

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.

How does the attraction between particles affect the ability of a solvent to dissolve in a substance