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An unstable particle called the pion has a mean lifetimeof 25 ns in its own restframe. A beam of pions travels through the laboratory at a speedof 0.70c.
(a) What is the mean lifetime of the pions as measured in thelaboratory frame?
what is the force of kinetic friction acting on the skier. avoid the length of her car and her reaction time.
A 67.00 kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between skis and snow is 0.19. What would be the magnitude of the acceleration.
A 750.0 kg boulder is raised from a quarry 125 m deep by a long uniform chain having a mass of 575 kg. What is the max acceleration the boulder can have
The current in a series circuit is 6.0 A. When an additional 17.0 resistor is inserted in series, What is the resistance in the original circuit
Two trains, each having a speed of 38 km/h, are headed at each other on the identical straight track. A bird that can fly 70 km/h flies off the front of one train while they are 68 km apart and heads directly for the other train. On reaching other tr..
From the shore of a frozen lake, a QB throws a 2 kg football at a velocity of 20 m/s. How far does the person slide before they come to a stop
What would be the equilibrium temperature when a 253-g block of copper at 281^circ C is placed in a 137g aluminium calorimeter cup containing 817-g of water at 14.5^circ C.
A 5.40×10-2- wad of putty is thrown horizontally at the block, hitting it with a speed of 2 and sticking. far does the putty-block system compress spring.
What is the pressure (in kPa) exerted by an object that has a base which is 2cm by 4cm nd a weight of 45N.
A torsion pendulum is made from a disk of mass m = 7.1 kg and radius R = 0.71 m. What is the angular frequency of oscillation of this torsion pendulum
A 2.93-kg model rocket is launched vertically upward with sufficient initial speed to reach a height of 3.71·102 m, even though air resistance (a nonconservative force) performs -6.11·102 J of work on the rocket.
A steel cable with a total length of 25.6 m and total mass of 95 kg is connected to two poles. Calculate the wavelength of the resulting wave on the cable
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