A ball is launched directly upwards from the ground. At max height, the ball has a gravitational potential energy of 10 J. If the ball the ball has a mass of 1 kg, then what was the initial velocity of the ball? Report your answer in units of meters per second (m/s) but only write down the number part.

A ball is launched directly upwards from the ground. At max height, the ball has a gravitational potential energy of 10 J. If the ball the ball has a mass of 1 kg, then what was the initial velocity of the ball? Report your answer in units of meters per second (m/s) but only write down the number part.

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Answer a and c
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A smal, dosely wound col has N tuns, area A, and resistance R. The col is intaly in a unform magnetic feld that has magnitude B and a drection perpendicular to the plane of the loop. The collisthen rapidly pulled out of the field so that the flux through the collis reduced to zero in time At. Part A What are the magnitude of the average emf E, and average curent I, induced in the col? Express your answer in terms of the variables N, A, R, B. and At. AZ + * O O ? E, Iy= • Part B The total charge Qthat fows though the col is given by Q= IavAt. Derive an expression for Q in terms of N, A, B, and R Note that Q does not depend on At. Express your answer in terms of the variables N, A, R, and B. ? Q=