PCS 130 Lab report 1 Charge to Mass Ratio

9:54 Sat 14 May 令7€ 1. History: Robert A. Millikan's oil drop experiment in the early 1900s is historically famous, because. a) it discovered the existence of electrons. it provided experimental evidence for the existence of an electron. it revealed that electrons are negatively charged. b) c) d) it estimated the value of the fundamental charge. field is

An electron is 0.5 Å away from a carbon nucleus which contains 6 protons. Find the mutual force of attraction between the nucleus and the electron. 1Å (Angstrom)= 10^-10m, e=1.6x10^-19C.

Options:  a) Neither, both have the same final KE b) the proton The answer is (a) neither, but I am struggling to understand why. I included my work, so maybe you can help me understand where I am going wrong.  Things we know:  KE = 1/3 MV^2 Mass of electron : 9.1 x 10^-31 kg (smaller) Mass of proton: 1.67 x 10^-27 kg (larger) Force = same magnitude for both since they both have the same magnitude of charge in the same Efield F=ma

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Particle Electron Proton Neutron Relative Charge -1 +1 0 What is: Electric Charge (C) -1.60 x 10-19 +1.60 x 10-19 0 a) The mass defect? Relative Mass (u) 5.485779 x 10-4 1.007276 1.008665 1u = 1.6605 x 10-27 kg 1eV = 1.60 x 10-19 Joules The 'cheating' equivalence shortcut 1u- 931.5 MeV He is the most abundant isotope of helium. Its mass is 6.6447x 10-27kg. Mass (kg) b) The binding energy of the nucleus in joules? 9.109390 x 10-31 1.672623 x 10-27 1.674929 x 10-27

Identify the following objects as being either ... a. positive b. negative c. neutral If there is no conclusive evidence, then select all that could be true. Description of Object a, b, or c? i. An object possesses more protons than electrons.   ii. An object possesses more neutrons than electrons.   iii. A formerly neutral object that just lost some electrons.   iv. A formerly neutral object that just gained some electrons.   v. An object which attracts a negatively-charged balloon.   vi. An object which attracts neutral paper bits and attracts a negatively-charged balloon.   vii. An object which attracts neutral attracts paper bits and repels a negatively-charged balloon.   viii. An object which attracts a negatively-charged balloon and attracts a positively-charged balloon.   ix. An object which attracts a charged balloon (balloon A) which is attracted to a negatively-charged balloon (balloon B).   x. An object which attracts a…

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Three charged particles with charges {-q, q, -q} are placed on the z axis at z = {-d,0, d}. See the diagram below. d d a. (4 pts) List as many symmetries associated with this arrangement of charges as you can identify. b. (6 pts) Calculate the electric field on the x axis: i.e. determine E(x, 0,0). c. (6 pts) Evaluate the electric potential on the x axis. i.e. determine $(x,0,0). d. (5 pts) Show that Ex e. (3 pts) Why were we able to apply E = -Vø as we did in part d without having obtained the full functional form for ø(x, y, z). Be explicit. f. (3 pts) What is E(x,0,0) in the limit x >> d to zeroth order in d/x? g. (3 pts) What is ø(x,0,0) in the limit x >> d to zeroth order in d/x?

QUESTION 13 Removing an electron from the metal requires 3.5 eV. The conversion between eV and J is: 1 eV = 1.6 x 10-19 J a) How many Joules is that? b) What is the velocity of the electron upon emission if the electron's mass is m-9.1*10-31 kg?

Atomic Physics attached question