The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 7.50 m. The magnetic field of the generator is 0.40 T, and the coil rotates at an angular speed of 21 rad/s. What is the peak emf of this generator?

What is a costume plot? why is it important to a film or theater production?

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Amerry-go-round of radius r, shown in the figure, is rotating at constant angular speed. the friction in its bearings is so small that it can be ignored. a sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. the sandbag does not slip or roll upon contact with the merry-go-round. how would you rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round from largest to smallest. a) m = 10kg, r = 0.25r b) m = 20kg, r = 0.25r c) m = 10kg, r = 0.50r d) m = 10kg, r = 1.0r e) m = 15kg, r = 0.75r f) m = 40kg, r = 0.25r