$5,000
$5.00 each
18 or 19 or more dollars
The density of a styrofoam ball is very low, typically around 0.05 grams per cubic centimeter. This low density is due to the fact that styrofoam is made up of mostly air trapped within its structure.
Around $0.05
it depends on what type of clay from crayola and how much of the amount you want to buy
$69.69
Most likely a couple of dollars for a bag.
Prices of styrofoam balls at Michael's are: 6" for $4.99; 5" for 3.99; 4" (2) for 4.99; 3" (6) for 4.99. Prices are subject to change.
5 cents
mass is sort of like the measure of an objects volume, and has no set number per substance, but density is a fixed figure. As to which object is denser, it depends what type of metal you are talking about, but most of the time metal would be more dense. As to how much mass they have, it depends how big the piece of Styrofoam is, and what type and how big the metal is.
25pounds
about 20