1 Steel shingle metal roof: Installation can cost at least $600 per square foot for the shingles. 2  Or run $750 per square foot for a standing seam steel roof. 3  Aluminum metal roof: Can cost anywhere between $700 and $1,200 per square foot.
Mass is the amount matter in an object. Mass is usually expressed in grams/pounds. For example, if you had a mass of 100 pounds and you went to the moon, you would still have â¦ a mass of 100 pounds, because there is 100 pounds of matter in you. However, your weight, or the gravitational pull on you, would change.
Mass refers to the quantity of matter present, and is expressed in terms of how much the object would weigh on Earth. A bit complex, so consider this example: a bowling ball that weighs 10kg on Earth has a mass of 10kg. On Jupiter the bowling ball would weigh quite a bit more, but its mass would still be 10kg.