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In the model of the hydrogen atom due to Niels Bohr, the electron moves around the proton at a speed of 3.3 × 106 m/s in a circle of radius 5.3 × 10-10 m. Considering the orbiting electron to be a small current loop, determine the magnetic moment associated with this motion. (Hint: The electron travels around the circle in a time equal to the period of the motion.)
An experimental bicycle wheel is placed on a test stand so that it is free to turn on its axle. What is the torque supplied by friction
A copper rod (length=2 m, radius=3×10-3 m) hangs down from the ceiling. A 9.0-kg object is attached to the lower end of the rod. The rod acts as a "spring," and the object oscillates vertically with small amplitude. Ignoring the rod's mass, determ..
A toy of mass 0.155 is undergoing simple harmonic motion (SHM) on the end of a horizontal spring with force constant 295 . When the object is a distance 1.15×10?2 from its equilibrium position, it is observed to have a speed of 0.305.
An arrow, starting from rest, leaves the bow with a speed of 26.6 m/s. If the average force exerted on the arrow by the bow were tripled, with what speed would the arrow leave the bow
A 38.0 mH inductor has a reactance of 1.90 k. What is the frequency of the ac current that passes through the inductor
A rocket is fired straight up and accelerates upward at 20 m/s2 for 12 seconds. What is the rocket's maximum altitude
A person stands on a bathroom scale in a motionless elevator. Calculate the acceleration of the elevator
A rope having a total mass of 0.4 kg and total length of 4 m has a 0.6 m of the rope hanging vertically down off a work bench. Explain how much work must be done to place all the rope on the bench?
A rectangular trough, 1.6 m long, 0.60 m wide, and 0.50 m deep, is completely full of water. at what speed does water emerge from the hole
A cylinder with a diameter of 0.240 m is placed between the plates of a hydraulic press as illustrated in the drawing. A 4.45 × 105-N force is applied to the cylinder. What is the pressure on the end of the cylinder due to the applied force?
A flight controller determines that an airplane is 30.0mi south of him, Half an hour later the same plane is 30.0mi north west of him, What is the magnitude of its velocity during this time
Your spaceship lands on an unknown planet. To determine the characteristics of this planet, Express the planet's mass in terms of the earth's mass
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