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In the Bohr model of the hydrogen atom, an electron (mass m=9.1×10?31kg) orbits a proton at a distance of 5.3×10?11m. The proton pulls on the electron with an electric force of 8.2×10?8N.
How many revolutions per second does the electron make?
A 200 N object is supported by two ropes. Rope 1 makes an angle of 35 degrees with the horizontal, What is the amount of tension in each rope
The transverse displacement (y) of a wave is given as a function of position (x in meters) and time (t in seconds) by the expression to the right. Determine the wavelength, frequency, period, and phase constant of this waveform.
A box of bananas weighinh 40 N rests on a horizontal surface. The coefficient of static friction between the box, the magnitude of the frictional force is
A 30kg child slides down a playground slide at a constant speed. find the magnitude of the kinetic friction force acting on the child
A particle of ionizing radiation creates 4900 ion pairs in the gas inside a Geiger tube as it passes through. What minimum energy was deposited
You place a 4.47-mm-high diamond on the axis of and 11.3 cm from a lens with focal length -6.79 cm. How high is the image
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 6.74x10-2 kg/s. find the speed at which gasoline moves through the fuel line
The length of a simple pendulum is 0.73m, the pendulum bob has a mass of 307 grams, and it is released at an angle of 12° to the vertical. With what frequency does it vibrate? Assume SHM. What is the pendulum bob's speed while it passes through th..
A college campus features a large fountain surrounded by the circular pool. Two students start at the northernmost point of pool and walk slowly around it in opposite directions.
An electromagnet produces a magnetic field of 0.540T in a cylindrical region of radius 2.70cm between its poles. What magnitude of force is exerted on the wire
You are driving north on 107th Avenue at a speed of 31.2 mph. At what frequency do you hear the siren
A series RLC circuit contains a resistor of 20 ohms, a capacitor of 0.75x10^-6 F, and an inductor of 0.120 H. what is the rms current in the circuit when operating at its resonance frequency
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