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In the park, a mom pushes tangentially on a hand-drivenmerry-go-round and is able to accelerate it from rest to afrequency of 20 rpm in 10.0 s. Assume the merry-go-round is a uniform disk ofradius 2.0 m and has a mass of900 kg, and two children (each with a massof 20 kg) sit opposite each other on the edge.
Calculate the torque required to produce the acceleration,neglecting frictional torque.
m·N
What force is required at the edge?
N
typical household currents are on the order of a few amperes.a. if a 1.64 a current flows through the leads of an
A diverging lens with a focal length of -22 cm and a converging lens with a focal length of 19 cm have a common central axis. Their separation is 19 cm. An object of height 3.0 cm is 10 cm in front of the diverging lens, on the common central axis..
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