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A body moving at .500c with respect to an observer disintigratesinto two fragments that move in opposite directions relative to their center of mass along the same line of motion as the original body. Onefragment has a velocity of .600c in the backward direction relativeto the center of mass and the other has a velocity of .500c in theforward direction. What velocities will the observer find?
Highg power lasers in factories are used to cut through cloth and metal. One such laser has a beam diameter of 1.50 mm, Find the power delivered by the laser
A 6.00 g bullet, traveling horizontally with a velocity of magnitude 450m/s, is fired into a wooden block with mass of 0.780kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 57.0 kg and a radius R = 0.625 m...
A resistor with an unknown resistance is connected in parallel to a 12 ohm resistor. while both resistors are connected to an emf source of 12 V, current across the unknow resistor is measured with an ammeter to be 3.0 A. What is the resistance of..
The intensity of the sound wave from a jet airplane is 9.1 W/m2 at a distance of 130 m. At what rate does the jet airplane radiate energy in the form of sound waves
A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 22.0 m/s. With what speed and angle of impact does the stone land
The position of a squirrel running in a park is given by : r=[(00.280 m/s)t+(0.0360 m/s^2)t^2]i+(0.0190 m/s^3)t^3j. At 4.20 , how far is the squirrel from its initial position
The outside mirror on the passenger side of a car is convex and has a focal length of -5.7 m. compute the magnification of the mirror
A model rocket fired vertically from the ground ascends with a vertical acceleration of 4.0 m/s2 for 5.8 s, What is the maximum altitude reached
A car driving at 33 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the car going when the driver changed the rate of dec..
A 0.500-kg block rests on the frictionless, icy surface of a frozen pond. what is the minimum uncertainty in the block's speed
A 1480{\rm kg} car pulls a 320{\rm kg} trailer. The car exerts a horizontal force of 3900{\rm N} against the ground in order to accelerate. What force does the car exert on the trailer
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