A rock with a volume of 4.0cm³ and density of 3.0g/cm³ has a mass of

12g

Explanation:

Given parameters:

Volume of rock  = 4.0cm³

Density of rock = 3.0g/cm³

Unknown:

Mass of the rock  = ?

Solution:

Density is the mass per unit volume of a substance.

Mathematically, it is expressed as;

   Density  =  

       Mass  = density x volume

Now, insert the parameters and solve;

       Mass  = 3.0g/cm³ x 4.0cm³  = 12g

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds