Jill has a mixture of sand and iron fillings. the mass of the mixture is 250 g. jill uses a magnet to seperate the two substances. then she measures the mass of the sand as 150 g what should be the mass of the iron fillings

Why don't you see your reflection in water with waves or repples

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?