A33.0 kg child named lindsey runs as fast as she can and jumps onto the outer edge of a merry-go-round. the merry-go-round is initially at rest and has a mass of 78.0 kg and a radius of 2.20 m . lindsey's linear velocity was 9.00 m/s at the moment she jumped onto the merry-go-round. what is the initial angular momentum of the system?

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants