Which two options describe physical properties of matter? A.
Whether a substance can be burned
B.
Whether a substance floats or sinks in water
C.
The temperature at which a substance boil
D.
The ability of a substance to combine with other substances
E.
Whether a substance tarnishes

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?

What is an electric motor? explain its operation. 2-3 sentence

What energy transformations occur each time the skateboarder rolls up the ramp?