Problem 6: A merry-go-round is a playground ride that consists of a large disk mounted to that it can freely rotate in a horizontal plane. The merry-go-round shown is initially at rest, has a radius R =1.3 meters, and a mass M = 261 kg. A small boy of mass m = 49 kg runs tangentially to the merry-go-round at a speed of v = 2.4 m/s, and jumps on. Randomized Variables R = 13 meters M = 261 kg m = 49 kg v = 2.4 m/s Part (a) Calculate the moment of inertia of the merry-go-round, in kg · m?. Numeric : A numeric value is expected and not an expression. I = 220.5 Part (b) Immediately before the boy jumps on the merry go round, calculate his angular speed (in radians/second) about the central axis of the merry-go-round. Numeric : Anumeric value is expected and not an expression. O1 = 1.846 Part (c) Immediately after the boy jumps on the merry go round, calculate the angular speed in radians/second of the merry-go-round and boy. Numeric : A numeric value is expected and not an expression. O2 = 504 Part (d) The boy then crawls towards the center of the merry-go-round along a radius. What is the angular speed in radians/second of the merry- go-round when the boy is half way between the edge and the center of the merry go round? Numeric : A numeric value is expected and not an expression.

Solve A and B correctly

Find the number of protons and neutron for Po-210. Separate your answer by a comma, indicating the number of protons first before the number of neutrons.

find A.B p A=50, 45) and Ba o (40, co") (40, 60")