Which statement is always true about objects which exert gravitational force on each other? they have mass. they have speed. they are a very large size. they exist only in outer space.

Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest

Find the mass, in grams, of 5.00*10^23 molecules of f2

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.