During science class while studying mixtures, you mix together iron fillings and sand. Your teacher challenges you to separate the sand and iron fillings. How could you use physical properties of matter to pratically seprate the two solids?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?