Troy investigates the density of an unknown piece of metal in the laboratory. Density is equal to mass divided by volume. The mass of the metal is 10.7 grams, and its volume is 1.5 cm³. Based on the data in this table conclusion can Troy make about the unknown metal? TABLE: gold=19.3, lead=11.4, silver=10.5, zinc=7.13. (Numbers in Density (g/cm³)

How much work would a child do while puling a 12-kg wagon a distance of 3m with a 22 n force directed 30 degrees with respect to the horizontal? (a) 82j (b) 52j (c) 109j (d) 95j

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question