An electron of momentum p is at a distance r from a stationary proton. the system has a kinetic energy k p2/2me and potential energy u ke2/r. its total energy is e k u. if the electron is bound to the proton to form a hydrogen atom, its average position is at the proton but the uncertainty in its position is approximately equal to the radius, r, of its orbit. the electron’s average momentum will be zero, but the uncertainty in its momentum will be given by the uncertainty principle. treat the atom as a one-dimensional system in the following: (a) estimate the uncertainty in the electron’s momentum in terms of r. (b) estimate the electron’s kinetic, potential, and total energies in terms of r. (c) the actual value of r is the one that minimizes the total energy, resulting in a stable atom. find that value of r and the resulting total energy. compare your answer with the predictions of the bohr theory.
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Physics, 22.06.2019 01:10
The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2
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Physics, 22.06.2019 02:00
Which safety measures should you follow during a thunderstorm? check all that apply. (a) avoid touching anything that conducts electricity. (b) avoid touching a person who has been struck by lightning. (c) go outside. (d) keep your computer turned off. (e) stay out of water. (f) stay inside.
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Physics, 22.06.2019 04:10
Time remainin52: 42the chart shows data for a moving object.which conclusion is best supported by the information inthe chart? time (s)velocity (m/s
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Physics, 22.06.2019 11:00
Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?
Answers: 1
An electron of momentum p is at a distance r from a stationary proton. the system has a kinetic ener...
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