A string with a linear density of 6 kg/m is stretched to a length of 0.9 meters and fastened at both end so that it can freely vibrate. The tension on the string is 1100 Newtons. At what speed would a wave propagate on this string

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?

Why do astronauts in the space shuttle weigh less?

Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current