Answer: A basis or standard for evaluation, assessment, or comparison; a criterion.
something that is used to judge or understand something else Definition of point of reference. : something that is used to judge or understand something else The professor used the study as a point of reference for evaluating and discussing other theories.
Explanation:
digestion begins in the mouth
Density of Mercury = 13.6 g/ml
Volume of mercury = 18.0 ml
Weight of Mercury = ?
By using the formula
Density = Mass / Volume or
D = M / V
M = D x V
Putting the values of D and V
M = 13.6g/ml x 18.0ml
M = 244.8 g
So the Mercury weighs 244.8 g