Speed/ velocity/ how fast the car is moving!
Hope this assists you!
I think it is building and managing of irrigation systems
Explanation:
If a body does not cover a equal distance at a equal interval of time it is said to be non uniform motion...

Answer;
=15855.40 kg/m^3
Explanation;
Volume (V) of the cylinder = pi x r^2 x h
V = 3.14 x (44/2 x 10^-3)^2 x 41.5 x 10^-3
V = 6.307 x 10^-5 m^3
By density = m/V
mass = 1 kg
density = 1/(6.307 x 10^-5) = 15855.40 kg/m^3