Cement Mix and Peanut Butter
I compared the density of a tub of cement mix and a jar of peanut butter. came out with similar different density levels.
Here is how I figured it out:
Cement Mix:
)-
)-
To get the volume of the tub, I measured the radius of the top and the height of the tub. The r = 8cm. The h = 15cm. The volume is 1lf h or (3.14)(8cm) (15cm) = 3,014 cm3.
To get density, I followed the formula d= mlv. In my case it was d = 3,864g/3,014cm3= 1.3 glcm3. With this number it should not float
in water.
~
The cement mix did not float!
filled a sink with water.
Peanut Butter:
~
To get the volume of the peanut butter jar, I measured the radius of the top vvhich vvas 3.5cm. Then I measured the height, vvhich vvas 12 cm. The volume is (3.14)(3.5cm) (12cm)= 461 cm3.
~ To get density, I followed the formula d = m/v. In this case, it was d= 5109/461 cm3= 1.1 g/cm3.
~
The peanut butter was almost floated, but not quite.
I proved that both objects I tested were denser than water, though just barely.