A 50 g marble is in a box of 10 cm across. Find the permitted energies and show that in the domain of everyday experience, quantum effects are imperceptible.
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A 50 g marble is in a box of 10 cm across. Find the permitted energies and show that in the domain of everyday experience, quantum effects are imperceptible.
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- To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 7.00 nm in diameter? Take the mass of an electron to be kg.Please don't provide handwritten solution ... An electron in the n = 4 level of an H atom emits a photon of wavelength 97 nm. To what energy level does the electron move?Calculate the work function of the metal when the threshold wavelength is 270
- The K series of the discrete spectrum of tungsten contains wavelengths of 0.0185 nm, 0.0200 nm, and 0.0215 nm. The K-shel lontzation onargy is 69.5 kev. Determine the ionization energies of the L, M, and N shels ke ke kev Need Help? Read Master Subnt Anoa 13. DETAILS SERCP11 28.A.P.047. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (0) How much energy is required to cause an electron in hydrogen to move from the n-2 state to the n-3 state? ev (b) If the eloctrons gain this energy by collision between hydrogen atoms in a high temperature gas, find the mimmum temperature of the heated hydrogen gas. The thermal energy of the heated atoms is given by 3kT/2. wihere k is the Boliemann conctant. Need Help? Read 14. DETAILS SERCP11 28.AP.048. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A puled ruby liner emits lght at 604,3 nm. For a 14.7-ps pulse containing 3.40 Jof energy, find the folowing (a) the physical length of the pulse as it travak through space mmIf the radius of a calcium ion is 0.27 nm, how much energy does it take to singly ionize it? Give your answer in electron-volts (eV) with precision 0.1 eV. Give your answer to 2 significant digits.(a) The position of an electron is known to within 14.5 Å (1.45×10-9 m). What is the minimum uncertainty in its velocity?(b) Repeat the calculation of part (a) for a helium atom.
- Describe your approach to determining the distance between the electron and proton in an atom if the potential energy U of the electron is known to be 14 eV. а. Use the law of conservation of energy. b. Use Coulomb's law. С. Use the definition of electrostatic potential energy U of one point charge q at position r in the presence of an electric potential. d. Use Newton's second law.An object is moving along a straight line, and the uncertainty in its position is 2.20 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball (mass = 0.0450 kg) and (c) an electron. (a) Number (b) Number (c) Number Units Units UnitsAn atom is in an excited state for 4.00 us before moving back to the ground state. Find the approximate uncertainty in energy of the photon in units of 10¹¹ eV. (A) 8.23 (B) 3.78 (C) 4.97 (D) 5.49 (E) 6.17