W = weight of the body in air = 160 N
ρ' = density of body
V = volume of the body
weight of the body in air is given as
W = ρ' V g eq-1
W' = weight of the body in liquid = 120 N
force of buoyancy is given as
F = W - W'
F = 160 - 120
F = 40 N
ρ = density of liquid = ?
force of buoyancy is given as
F = ρ V g eq-2
dividing eq-1 by eq-2
160/40 = ρ' V g /(ρ V g )
4 = ρ' /(0.8 )
ρ' = 3.2
(b)3.2
<span>a change in allele frequencies in a population over time also known as evolution</span>
Avogadros law is applied when temperature and pressure remain constant, and details the direct relationship between moles and volume in this circumstance
One astronomical unit (AU) is the average distance from the Earth to the Sun, which is about 93-million miles or about 8.5 light-minutes.
A light-year is the distance light travels in one year in a vacuum, which is about 6-trillion miles. One light-year is about 64,500 times longer than one AU.