a set of pulleys is used to lift a piano weighing 500 newtons. the piano is lifted 6 meters in 30 seconds. how much power is used?

If a 60-g object has a volume of 30 cm3, what is its density? 2 g/cm3 0.5 cm3/g 1800 g * cm3 none of the above

Which term refers to a property that depends only on the amount of a substance? ©@

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral