Question 7 b(ii) , b(iii) and 7 a(ii) , 7a(i) 7. An electron is accelerated through a potential difference of 12.1 V.n =n0.54 eV0.8 eVn = 3-1.5 eVn = 2-3.4 eVn = 1-13.6 eV(a) How much kinetic energy has it gained in (i) electronvolts (ii) joules?(b) This electron hits a hydrogen atom and excites it.(i) Explain what is meant by excitation(ii) Using the energy values given in the diagram above, work out the two energy levels between which thisaccelerated electron will likely produce a transition.(iii) Calculate the energies of the three photons that might be emitted as the electron return to the ground state.8. The three lowest energy levels of an atom are shown below.-1.6 eV-6.2 eVn =n = 2n = 1-18.6 eV(i) Determine the minimum energy in joule required to eject an electron initially in the lowest energy level fromthe atom.k(ii) Assuming that the energy level, n, is associated with energydetermine the energy of the level n = 4 inelectronvolts.(iii) Determine the wavelength of the electromagnetic radiation emitted when an electron makes a quantumjump from the level n3 to the level n =2. Name the region of the electromagnetic spectrum in which thisradiation is found.|||||

Given: The electron accelerated through the potential difference V = 12.1 V

7. An electron is accelerated through a potential difference of 12.1 V. n = 5 -0.54 eV 0.8 eV n = 3 -1.5 eV n = 2 -3.4 eV n = 1 -13.6 eV (a) How much kinetic energy has it gained in (i) electronvolts (ii) joules? (b) This electron hits a hydrogen atom and excites it. (i) Explain what is meant by excitation (ii) Using the energy values given in the diagram above, work out the two energy levels between which this accelerated electron will likely produce a transition. (iii) Calculate the energies of the three photons that might be emitted as the electron return to the ground state.

7. An electron is accelerated through a potential difference of 12.1 V. n = 5 -0.54 eV 0.8 eV n = 3 -1.5 eV n = 2 -3.4 eV n = 1 -13.6 eV (a) How much kinetic energy has it gained in (i) electronvolts (ii) joules? (b) This electron hits a hydrogen atom and excites it. (i) Explain what is meant by excitation (ii) Using the energy values given in the diagram above, work out the two energy levels between which this accelerated electron will likely produce a transition. (iii) Calculate the energies of the three photons that might be emitted as the electron return to the ground state.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

The force P of magnitude 50 KN is acting at 215° from the x-axis. Find the components of P in u 157° from x, and v negative 69°from x. (Draw the Figure)
1. ANALYTICAL METHOD OF ADDING VECTORS Solve the same problem as PART 1 but this time analytically. START with the values below. DO NOT USE VALUES FROM PART 1. Suppose you first walk A = 12 m in a direction 20° west of north and then B= 20 m in a direction 40° south of west. Let the +x-axis coincide with the easterly direction and the +y-axis with the northerly direction. Note: In this problem, do not round values if you need to use them for calculations in subsequent parts. Rounding errors can propagate and can make your final answer lie outside the tolerance limit of 5% set for this problem. Keep all answers to 4 significant figures.
Two vectors are given by A = 3 î + 6 ĵ and B = -1 î + ĵ. (a) Find A × B. k (b) Find the angle between A and B.
Here's how gym membership works for a potential customer: If the customer decides to join the gym, she will pay J on day 0. Then, she can use the gym starting the next day for 5 days (1; 2; 3; 4; 5), paying an additional F on each day she visits. If she goes to the gym on any given day, it costs her (10+ F) that day, but beneÖts her 30 the next day. In other words, her "costs" are a sum of her psychic costs (10) and actual Onancial costs (F). Assume that, when indi§erent, the individual will go to the gym. (a) Suppose the potential customer is a standard exponential discounter with a discount factor of = 12. If gym membership was free (i.e. J = 0 and F = 0) would she join the gym? If so, how many days would she actually go? (b) Suppose the gym did not charge a joining fee. How high could it set the usage fee? What would its revenues from this customer be? (c) Suppose instead the gym decided not to charge a usage fee. How high could it set the joining fee? [Hint: To Ögure out the…
Consider the vectors A=<1,2,3>, B=<-2,1,0>, and C=<0,3,1>. (a)Find the angle between A and B. (b)Find the component of A in the direction of C.
Given vectors M = 2i + 6j and N = i + 2j. Calculate the angle that vector C = M – 2N makes with the positive x axis?
(6%) Problem 5: Consider the following vectors: A = 4.6i + 1.4j+ 3.4k В = -6. 5i + 7.1j + 10.2k 25% Part (a) What is the x-component of the vector V = 3(A × 2B)? Vx= sin() cos() tan() 7 8 9 НOME cotan() asin() acos() E 4 5 atan() acotan() sinh() 1 cosh() tanh() cotanh() + END Degrees Radians Vd BACKSPACE DEL CLEAR Feedback Submit Hint I I give up! Hints: 2 for a 0% deduction. Hints remaining: 0 Feedback: 3% deduction per feedback. -This is a cross-product, so the answer will be a vector. In this part, we just want the x-component of the vector. Keep in mind that scalars like "2" and "3" distribute 3.
(D − 2)2y = 16
Q 1: Let å = -2 ỉ +3 j +6 k and b = 4 i + 6 j , Find ( 2 å + 3 b ,1-ål, å * å , å * b_ )
a) Find the x−coordinate and y− coordinate of the point E=(x,y,−0.35m) on the line of action of F¯. x = ___m y = ___m b) If the x−component of F is known, and F=−104Ni+Fyj+Fzk, calculate the values of Fy and Fz. Fy = ___ N Fz = ___ N c) What will the equivalent force and couple moment at point A be for the force system consisting of your calculated force F in part (b) and the couple with moment M=860Nm? Answer the question by completing the statements. Equivalent force at point A = ( __ i + __ j + __?) k) N. Equivalent couple moment at point A = ( __ i + __ j + __k ) Nm. Part (d) is not related to Parts (a), (b) and (c); this question stands on its own. d) The line of action of the force F is set so that the moment of F about A is a maximum. If it is known that F=100Ni − 100Nj + vk , calculate the value of v. v = N Part (e) is not related to Parts (a), (b), (c) and (d); this question stands on its own. e) Let F=(150i−150j+100k)N. Calculate the…
On a certain mountain, the elevation z above a point (x,y) in an xy-plane at sea level is z = 2000 −0.02x2−0.04y2, where x, y, and z are in meters. The positive x-axis points east, and the positive y-axis north. Stephie is at the point (20,5,1991). (a) If Stephie uses a compass reading to walk northeast, will she ascend or descend? At what rate?
Given the vectors A=7-6ŷ+9 2 B=-5-2ŷ Is the angle sandwiched between them acute or obtuse?