Impetus describes the kind of force that encourages an action (the impetus behind the project) or the momentum of an action already begun (the meetings only gave impetus to the rumors of a merger).
Materials Needed: The box from the last experiment; a ruler that measures centimeters. Procedure: Measure each side of the box in centimeters. Use the formula for the volume of a box shaped object (V = L x W x H ) to calculate the volume of this box in cubic centimeters. What Happened: Each side was 10 cm long. When you plug the numbers into the formula and do the math, you get:
The notion of unit volume can be used to talk about the density of an object. The definition of density is as follows: density = mass/unit volume. It has units of mass divided by units of length 3 , so it is usually given as kg/m 3 or g/cm 3. Notice how the idea of unit volume enter here.