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Two hockey players are traveling at velocities of v1 = 11 m/s and v2 = -20 m/s when they undergo a head-on collision. After the collision, they grab each other and slide away together with a velocity of -3.5 m/s. Hockey player 1 has a mass of 122 kg. What is the mass of the other player?
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
Monochromatic light with wavelength 570nm passes through a circular aperture with diameter 7.00?m. What is the diameter of the Airy disk on the screen
Suppose a formula for gain in heat energy of an object is H = m(A - B), where m = mass and (A - B) is its rise in temperature between A degrees and B degrees (as in #4). Write an expression for the absolute uncertainty, delta-H, in terms of m, del..
A ball with a mass of 0.580 is initially at rest. It is struck by a second ball having a mass of 0.415 , initially moving with a velocity of 0.260 toward the right along the axis. What is the change in the total kinetic energy of the two balls
q1. what is the frequency shift of a 68 police radar signal when it reflects off a car moving at 117? radar waves
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. Her near point is 25 cm from her eye. What is the angular magnification when the image of the stamp is 39 cm from the eye
As part of a safety investigation, two 1700 cars traveling at 18 are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.80 to stop, and (b) car that hits a concrete barrier and t..
A gasoline engine fuel burns at a temp of 500 degrees Celsius. Its radiator cools to 70 degrees celsius. What is the engines Carnot efficiency
An electric kettle of 7.0 Ω resistance containing 500 cm3 of water at 10ºC is connected to the 110 V supply. calculate how long it takes to convert all of the water into steam
A horizontal spring with force constant k = 4.80N/m connects the other end of the rod to a vertical wall. The rod is in a uniform magnetic field B = 0.310T directed into the plane.
A heat pump keeps a house warm at 72.0 degrees Fahrenheit when the outside temperature is 0 degrees Fahrenheit. How much heat is drawn in from the outside
Draw a motion diagram for the train. Assume that the train is moving toward the right and starts to slow down at t = 0. The separation of each dot represents an elapsed time of one second.
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