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Two 32.4-cm metal rods, one made of copper and one made of aluminum, are placed end to end, touching each other. One end is fixed, so that it cannot move. The rods are heated from 0.0° C to 163° C. The coefficient of linear expansion for copper is 1.6 10-5 K?1 and for aluminum is 2.25 10-5 K?1. How far does the other end of the system of rods move?
as two trains move along a track their conductors suddenly notice that they are headed toward each other. the figure
A 79 kg person sits on a 3.7 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3 cm in diameter. Find out the pressure exerted on the floor by each leg of the chair, suppose the weight is evenly distributed.
question1a long solenoid has 100 turnscm and carries a current i. an electron moves within the solenoid in a circle of
Suppose you measure the terminal voltage of a 3.260 V lithium cell having an internal resistance of 5.50 by placing a 1.00 kvoltmeter across its terminals, Find the actual terminal voltage to the nearest 0.01 V
A power station delivers 530 kW of power at 12,000 V to a factory through wires with total resistance 3.5. How much less power is wasted
A student on a piano stool rotates freely with an angular speed of 3.05 rev/s. Calculate the initial kinetic energy of the system
Design a decorative "mobile" to consist of a low-mass rod of length 0.46 m suspended from a string so that the rod is horizontal, find the tension in the string that supports the mobile
With each cycle, a 2550-W engine extracts 2180 J from a thermal reservoir at 87.7°C and expels 1570 J into a thermal reservoir at 21.7°C. What is the work done for each cycle
A student decides to move the box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 168 N at an angle of 30.0° above the horizontal. The box has a mass of 21.0 kg, and the coefficient of kinetic f..
A positively charged particle of mass 6.20 multiply.gif 10-8 kg is traveling due east with a speed of 50 m/s, What is the magnitude of the magnetic force acting on the particle
The output voltage of an AC generator is given by ?v = 107 V sin (45?t). Find average power delivered to the inductor
Two slits are separated by .1 mm. Planar light incident on them produces a diffraction pattern on a board 1.35 m away, estimate the wavelength of light
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