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1. Compare the gravitational attraction of an electron and proton in the ground state of a hydrogen atom to the Coulomb attraction. Are we justified in ignoring the gravitational force?
2. Show that the frequency of revolution of the electron in the Bohr model hydrogen atom is given by y= 2|E| /hn where E is the totalenergy of the electron.
A hollow sphere of negligible mass and radius R is completely filled with a gas so that its density is p. What is the density of the enlarged sphere
How far from the dog would the suitcase land? You can ignore air resistance.
At what distance from a single slit of width 0.155 mm should a screen be placed so that the width of the Fraunhofer central diffraction maximum is 15.5 mm (100 times the slit width), using light of wavelength 476 nm? Discover the angle locating the s..
a charge q is located at the center of a hollow thick uncharged spherical shell thickness b-a. induction will lead to
A student ofmass m standsat one end of a long log of length l and mass M, which is floating on the campuspond at right angles tothe shore. Assume there is no friction between the logand the water.
An airplane flies at a constant speed (v) in a horizontal circle of radius (R). calculate the magnitude in Newton's of the centripetal force on the plane
A water molecule floating in the air loses one electron, becoming an ion, What is the magnitude of the electric force between the electron and the water ion
A factory worker pushes a 25.0 kgcrate a distance of 4.6 m along a level floor at constant velocityby pushing horizontally on it. What is the total work done on the crate
liquid crystal display lcd projectors have a small lcd screen inside of them. this emits light and serves as the object
Find out the critical angle theta_ce for e-waves in calcite. The index of refraction for light with electric field parallel to the optical axis (called extraordinary waves or e-waves) is 1.4864. The index of refraction for light with electric fiel..
Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 44.0, What is her average speed on the return trip
A 5.60 kg of mass is pressed against a spring with a spring constant of 12500 N/m. what potential energy is stored in the spring before the mass if released
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