If the density and volume of an object is known, what can also be found?

a) the mass of the object
b) the shape of the object
c) the size of the object
d) the thickness of the object

The correct answer is option A.

Explanation:

Density is defined as mass of the substance present in the unit volume of the substance.

If density is known and volume is known one can easily determine the mass of the given substance.

vapour or gas assuming atmospheriv pressure

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j