What is meant by density? what are its SI unite?
please answer me..​

Density, mass of a unit volume of a material substance. ... Density offers a convenient means of obtaining the mass of a body from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), while the volume is equal to the mass divided by the density (V = M/d).

Explanation:

The International System of Units is the modern form of the metric system. It is the only system of measurement with an official status in nearly every country in the world

Density is mass per unit volume

Explanation:

SI unit is kgm3

prolly a beacuse the momentuem the car has increases while going down hill

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2