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A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 17 in 9.1 . Assume the merry-go-round is a uniform disk of radius 2.5 and has a mass of 770 , and two children (each with a mass of 24 ) sit opposite each other on the edge. a) Calculate the torque required to produce the acceleration, neglecting frictional torque. b)What force is required at the edge?
A platinum resistance thermometer has resistances of 200.0 ? when placed in a 0?C ice bath and 253.8 ?, What is the melting point of potassium
In one of the original Doppler experiments a tuba was played on a moving flat train car at a frequency of 75 hz, What beat frequency was heard if the train car approached the station at a soeed of 10m/s
Calculate kinetic energy of a solid uniform sphere with a radius of 0.150 and a mass of 16.0 if it is rotating at 6.20 about an axis through its center
An air-core solenoid with 80 turns is 10.64 cm long and has a diameter of 1.09 cm. How much energy is stored in its magnetic field when it carries a current of 0.44 A
A car moving at 35 m/s approaches a stationary whistle that emits a 220Hz sound. The speed of sound is 343m/s. What is the frequency of sound heard by the driver of the car
A proton is passing through a uniform, 0.500-T magnetic field and is directed along the x axis. find the pitch of the helix
christian ramirez a small 0.12kg metal ball is tied to a very light sting 0.80m long to form a pendulum that is then
To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 14cm in diameter and 60cm in length, What is the total length of wire you will need to meet these specifications
A homer run is hit in such a way that the baseball just clears a wall 14m high, located 122m from home plate. find the speed of the ball when it reaches the wall
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. What is the total time the blue car is moving
A tank circuit in a radio transmitter is a series RCL circuit connected to an antenna. find minimum and maximum inductance of the tank circuit
The intensity of an earthquake waves passing though the Earth is measured to be 2.0 x 10^6 J/m^2xs at a distance of 48km from the source. What was its intensity when it passed a point only 1.0km from the source
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