A 38.0 kg child is riding a playground merry-go-round that is rotating at 45.0 rev/min. What centripetal force (in N) is exerted if he is 1.25 m from its center?

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

Galileos view of arrangement of the universe