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A playground merry-go-round of radius R = 2.20 m has a moment of inertia I = 235 kg · m2 and is rotating at 12.0 rev/min about a frictionless vertical axle. Facing the axle, a 23.0-kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round?
A major motor company displays a die-cast model of its first automobile, made from 6.60 kg of iron. What mass of gold is needed to make the new model
A cue ball m1 = 0.39 kg is shot at another billiards ball m2 = 0.59 kg which is at rest. The cue ball has an initial velocity of v =9.5 m/s. What is the cue balls final velocity in m/s
An 8 g of ice cube at %u2013 120 C is put into a thermos flask containing 100 cm3 of tea at 850C. What is the drop in temperature for tea
A photon has an energy equal to the kinetic energy of an electron with speed, u, which may be close to the speed of light, c. Calculate the ratio of the wavelength of the photon to the wavelength of the electron
A block of mass m is attached to a spring (spring constant k)which is attached to a wall, find the amplitude of the resulting simple harmonic motion?
A 5.17-g bullet is moving horizontally with a velocity of +340 m/s, where the sign + indicates that it is moving to the right, What is the velocity of the second block after the bullet imbeds itself
The neutral hydrogen atom in its normal state behaves in some respects like an electric charge distribution which consists of a point charge of magnitude +e surrounded by a distribution of negative charge
A uniform rod of mass 3.35×10?2kg and length 0.430m rotates in a horizontal plane about a fixed axis through its center, What is the angular speed of the rod after the rings leave it
A rifle with a barrel length of 56 cm fires a 14 g bullet with a horizontal speed of 350 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 13 cm.
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1330 Hz. The bird-watcher, however, hears a frequency of 1410 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
a birthday cake candle 4 cm high is 10 cm from a converging lens whose focal length is 15 cm. use a ray diagram on a
Suppose you have a tube 1.20 m long, open on both ends. Determine the frequency of the 2nd overtone, assuming the speed of sound to be 343 m/s. Repeat for the same length tube but with a closed end.
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