An object made of a single atomic element weighs 0.8000 n in air and 0.7295 n when completely submerged in water. calculate the density of the object.

Explanation:

Density is defined as mass per unit volume.

Specific Gravity is the ratio of the density of a substance to the density of water, or it is the ratio  of the weight of a body to the weight of an equal volume of water

Therefore we can compute the S to be

S = W / W-W1

W = weight of the solid in air = 0.8000N

W1 = weight of solid in water = 0.7295N

S = 0.8 / 0.8- 0.7295 =

0.8/ 0.0705    = 11.35

Density of the object = specific gravity × density of water

= 11.35 × 1 g/cm3 = 11.35 g/cm3

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6