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A playground merry-go-round has a disk-shaped platform thatrotates with negligible friction about a vertical axis. The diskhas a mass of 200 kg and a radius of 2.2 m. A 36- kg child rides atthe center of the merry-go-round while a playmate sets it turningat 0.15rpm. If the child then walks along a radius to the outeredge of the disk, how fast will the disk be turning (in rpm)?
A block with mass of 4.52 kg is attached to a horizontal spring with spring constant k = 3.59 102 N/m, Find the speed of the block at the equilibrium point
1. given the energy range of a radiation source to be 0.5 ev. calculate the same energy range in joules. dont use the
A skateboarder shoots off a ramp with a velocity of 7.4 m/s,directed at an angle of 55° above the horizontal. The end ofthe ramp is 1.4 m above the ground. Let the x axis beparallel to the ground, the +y direction be verticallyupward, and take as ..
q1. points a and b have electric potentials of 320 and 160 respectively. when an electron released from rest at point a
A 0.160 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. What is the mass of the second ball
An electric trimmer blade has rotational inertia 1.85×10^-4 kg*m^2. How much work was done to accelerate the blade
A 10 cm high object is situated 25 cm in front of a convex mirror that has a radius of curvature of 1.00 102 cm.
A heat engine operates in a Carnot cycle between72.0°C and345°C. It absorbs21,600J of energy per cycle from the hot reservoir. How much energy does it expel in each cycle by heat
A transformer has 20 turns of wire in its primary coil and 40 turns on its secondary coil. What is the power delivered to this transformer
If the Hawaiian hot spot is a fixed hot spot, which of directions is closest to the direction that the Pacific Plate was apparently moving as the Emperor Seamount Chain formed.
a physical pendulum consists of a uniform solid disk (of radius R = 56.6 cm) supported in a vertical plane by a pivot located a distance d = 24.0 cm from the center of the disk. What is the period of the resulting simple harmonic motion
The fresh water behind a reservoir dam is 15.0 m deep. A horizontal pipe 3.00 cm in diameter passes through the dam 8.0 m below the water surface, What volume of water flows out of the pipe
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