EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Chapter 38, Problem 4Q
To determine
The reason for the baseball to have a well-defined position and speed, whereas an electron does not based on the uncertainty principle.
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Chapter 38 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
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- Imagine playing baseball in a universe (not ours!) where the Planck constant is 0.60 J s and thus quantum physics affects macroscopic objects. What would be the uncertainty in the position of a 0.50 kg baseball that is moving at 20 m/s along an axis if the uncertainty in the speed is 1.0 m/s?arrow_forwardThe treatment of electrons in atoms must be a quantum treatment, but classical physics still works for baseballs. Where is the dividing line? Suppose we consider a spherical virus, with a diameter of 30 nm, constrained to exist in a long, narrow cell of length 1.0 μm. If we treat the virus as a particle in a box, what is the lowest energy level? Is a quantum treatment necessary for the motion of the virus?arrow_forwardWhat is the “central-field approximation” and why is it only an approximation?arrow_forward
- A particle is in a box of length L. Suddenly, the length of the box is increased to 2L. What happens to the energy levels as shown? (a) nothing; they are unaffected. (b) They move farther apart. (c) They move closer together.arrow_forwardWhy would it most likely be difficult to observe quantized orbital states for satellites orbiting the earth? On a macroscopic level, the orbital states do exist for satellites orbiting Earth but are too closely spaced for us to see. On a macroscopic level, the orbital states do not exist for satellites orbiting Earth. On a macroscopic level, we cannot control the amount of energy that we give to an artificial satellite and thus control its orbital altitude. On a macroscopic level, we cannot control the amount of energy that we give to an artificial satellite but we can control its orbital altitude.arrow_forwardConsider an electron in an infinite potential well size of a=0.1 nm. What is the ground energy of the electron? What is the energy required to put the electron at the third energy level?Calculate the wavelength of the photon that would provide this required energy? (Planck’s constant =6.6x10-34 J.s, electron mass = 9,11x10-31 kg)arrow_forward
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