21.A photon of frequency is scattered by an electron initially at rest. Verify that the maximum kinetic energy of the recoil electron is KEma= (2h°v*mc*/(1+2hv/mc?). %3D
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- 4. An electron has a momentum py = 1.30 × 10-25 kg.m/s. What is the minimum uncertainty in its position that will keep the relative uncertainty in its momentum (Apy/p) below 2.9%? nmHW5 Q102. Solve the de Broglie wavelength of: a. a tennis ball of mass 57 g traveling 25 m/s b. an electron with kinetic energy 50 eV. 3. Find the de Broglie wavelength of a 1.00-MeV proton. Is a relativistic calculation needed?
- Potassium and gold cathodes are used in a photoelectriceffect experiment. For each cathode, find:a. The threshold frequency b. The threshold wavelengthc. The maximum electron ejection speed if the light has awavelength of 220 nmd. The stopping potential if the wavelength is 220 nmQuestion 9 (1) АМА N M. Three particles of equal mass are traveling in the same direction. The de Broglie waves of the three particles are as shown. Rank the speeds of particle I, II, III A. VII VIII B. VII VIIIVI C. VI-VII VIII D. VIIVI-VIII A B D 1 ptsA 1210 kg car is moving at 15.0 m/s. Which of these equals its de Broglie wavelength? A. 1.20*10^-29 m B. 8.21*10^-36 m C. 3.65*10^-38 m D. 5.34*10^-32 m
- A free electron in a gas is struck by a 5.95 nm X-ray, which experiences an increase in wavelength of 1.97 pm. How fast is the electron moving after the interaction with the X-ray? (in m/s) A: 1.079x105 OB: 1.220x10 Oc: 1.378x10 OD: 1.558x105 OE: 1.760x105 OF: 1.989x10 OG: 2.247x10 OH: 2.540x105 Submit Answer Tries 0/20An electron and a 0.0440-kg bullet each have a velocity of magnitude 480 m/s, accurate to within 0.0100%. Within what lower limit could we determine the position of each object along the direction of the velocity? electron ? mm bullet ? m6. An electron, starting from rest, accelerates through a potential difference of 25.0 V. What is the final de Broglie wavelength of the electron, assuming that its final speed is not relativistic? nm oft pof19 o0 oof19
- An electron and a 0.0380-kg bullet each have a velocity of magnitude 510 m/s, accurate to within 0.0100%. Within what lower limit could we determine the position of each object along the direction of the velocity? electron mm bullet mProblem 1: Light of frequency 9.95 x 1014 Hz ejects electrons from the surface of a metal. If the maximum kinetic energy of the ejected electrons is 0.180 x 10-1⁹ Joules, find: h= 6.626 x 10-34 J.S. 1. The work function for the metal 2. The cuff off frequency for the metalAn electron is travelling at 0.7c. What is the deBroglie wavelength of this electron?A. 2.47 pmB. 3.48 pmC. 2.74 nmD. 1.85 µmE. 3.26 mm