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An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.0 cm, and length 35 cm. When 2.0 A of current flows through the solenoid, the magnetic field inside the iron core has magnitude 0.48 T. What is the relative permeability KB of the iron core?
X-rays having an energy of 250 keV undergo Compton scattering from a target. Find the Compton shift at this angle
Explain how much mechanical energy is lost due to friction acting on the runner? How far does he slide?
A small sphere of charge q1 = 0.872 µC hangs from the end of a spring. When another small sphere of charge q2 = -0.642 µC is held beneath the first sphere, the spring stretches by d = 3.57 cm from its original length.
A car is traveling along a straight road at a velocity of +39.0 m/s when its engine cuts out. For the next ten seconds the car slows down, Find the velocity of the car at the end of the initial ten-second interval
The intensity of the light that reaches Earth from the star is 3.94 x 10-21 W/m2. At what rate does the star radiate EM energy
A 821 kg car is going 29 m/s and the driver has to slam on his brakes to prevent an accident. what is the change in temperature of the brake pads and rotors
Three masses are placed at different points along a meter stick of negligible mass: 0.09 kg at 0.98 m, 0.04 kg at 0.55 m, Where's the center of mass of the system
A 300-g mass at the end of a Hookean spring vibrates up and down in such a way that it is 2.0 cm above the tabletop at its lowest point and 16 cm above its highest point, Determine the amplitude of vibration
assume the film show in the figure has an index of refraction of 1.36 and is surrounded by air on both sides.
A block that was initially at rest is sliding on a steel surface at 0.8 m/s for .2 m. Calculate the temperature rise from friction
A proton and an electron are held apart a distance of one meter, Calculate the electric force F between them and Show the electric force vector on each of them
A certain waffle iron is rated at 0.62 kW when connected to a 120-V source. What current does the waffle iron carry
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