Why is it important for an art conservation scientist to study the properties of a painting before it's repaired?

The pressure in a fluid is affected by which characteristics of that fluid

What forms when chemical reactions combine pollution with sunlight?

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.