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A railroad car of mass 2.50 104 kg, is moving with aspeed of 4.09 m/s. Itcollides and couples with three other coupled railroad cars, eachof the same mass as the single car and moving in the same directionwith an initial speed of 2.05 m/s.
(a) What is the speed of the four cars after the collision?
(b) How much energy is transformed into internal energy in the collision?
In an old house, the heating system uses radiators, which arehollow metal devices through which hot water or steam circulates.In one room the radiator has a dark color (emissitivity = 0.891).It has a temperature of 66.1 oC.
a a reversible heat pump is used to maintain a temperature of 0c in a refrigerator when it rejects the heat to the
A 1.50 kg box (position is given in meters and time is given in seconds) slides on ice for 1.5 seconds and then encounters a rough surface. Find out the momentum at the start of the animation. Is momentum conserved during the first 1.5 seconds? Is..
Consider a tennis ball cannon people use to practice their game: what is the approximate wavelength of these tennis balls
a hospital patient has been given 131i half life 8.04 days which decays at 4.5 times the acceptable level for exposure
Apollo 11 (total mass 43,100 kg) was in an orbit 11 km above the surface of the moon. What was the speed of Apollo 11 while it was orbiting the moon
The figure below shows a conducting rod sliding along a pair of conducting rails. The conducting rails have an angle of inclination of theta= 39.0 degrees. What is the rod's terminal speed?
Monochromatic light falls on a slit that is 3.50 multiplied by 10-3 mm wide. what is the frequency of the light used
A spy satellite is in circular orbit around Earth. It makes one revolution in 5.99 hours, How high above Earth's surface is the satellite
Superman attempts to drink water through a very long straw.With his great strength he achieves maximum possible suction. Find the maximum height through which he can lift the water
q1. a 48-m length of wire is stretched horizontally between two vertical posts. the wire carries a current of 64 a and
The loop, having rotated by 45°, rotates clockwise another 30°, so that the normal to the plane points at an angle of 75° with respect to the direction of the magnetic field. Find the magnetic flux through the loop
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