Mass, Weight, Density And Pressure

Question 1

What is the formula for weight? What are the equation’s units? Give an example of the formula rearranged.

Answer 1

W=mg
N=kg x kg/N

E.g.
m=W/g

W
G m

Question 2

What is the formula for density? What units are represented by the formula? Give an example of the equation rearranged.

Answer 2

P=m/v
Kg/m³=(kg(/(kg/m³)

E.g.
m=pV
V=m/p

M
P v

Question 3

What is the equation for pressure? What are the units used in the formula? Give an example of the equation rearranged.

Answer 3

P=f/a
Pa or N/m2 = N/m2
X 10000 = N/cm2

E.g.
F=PA
A=F/P

F
P A

Question 4

How does pressure in liquids differ from pressure in other bodies?

Answer 4

1) pressure acts in all directions
2) liquids are incompressible, thus pressure is constant