What are the two factors that determine the strength of the gravitational force between two objects?
a.
size and speed
b.
density and mass
c.
mass and distance
d.
mass and temperature
it is eather c or a i think

Which one of the following is true of trnas? a) trnas are double-stranded. b) each trna binds a particular amino acid. c) there are four types of trna. d) trnas carry special sequences known as codons. e) all of the above