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

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 nm

Question 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 pts

A 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 0/20

An 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            ?          m

6. 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       m

Problem 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 metal

An 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