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- Suppose an electron is confined to a region of length 0.1 nm (of the order of the size of a hydrogen atom) and its kinetic energy is equal to the ground state energy of the hydrogen atom in Bohr's model (13.6 eV). (a) What is the minimum uncertainty of its momentum? What fraction of its momentum is it? (b) What would the uncertainty in kinetic energy of this electron be if its momentum were equal to your answer in part (a)? What fraction of its kinetic energy is it?Part C At a local high school track meet, an athlete in the 100 m spring reaches a top speed of 6.6 V(vm m/s)). If the athlete's mass is 59 V{vm kg}\) , what is their de Broglie wavelength? 1.55x10-28 (vm m)\) O 3.41x10-36 vvm m)) 1.70x10-36 V(vm m)\) O 5.87x1035 V{\vm m}\) Submit Request Answer Part D What is the longest wavelength of the Balmer series (\(n'=2\))? O 1.82x10-7 v\m m}\) O 1.22x10-7 {\m m}\) O 3.65x10-7 {\vm m}\) O 6.56x10-7 Vm m}\) O 5.47x10-7 vm m)) Submit Request AnswerWhen ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV. Part A What is the maximum kinetic energy Ko of the photoelectrons when light of wavelength 310 nm falls on the same surface? Use h = 6.63x10-34 J-s for Planck's constant and c = 3.00×108 m/s for the speed of light and express your answer in electron volts. ► View Available Hint(s) 15. ΑΣΦ Ko= 2.60 Submit Previous Answers ? X Incorrect; Try Again; 29 attempts remaining eV
- When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV. Part A What is the maximum kinetic energy Ko of the photoelectrons when light of wavelength 260 nm falls on the same surface? Use h = 6.63x10-34 J. s for Planck's constant and c = 3.00x10° m/s for the speed of light and express your answer in electron volts.Find a simulation that will allow you to perform the photoelectric experiment virtually. Sketch a graph for each of the following relationships (controlled variables in parentheses): C. Maximum kinetic energy of the photoelectrons and frequency in order to determine both the work function for the metal and Planck's constant (metal and intensity). Questions for further analysis based on the three relationships investigated: C. Maximum Kinetic Energy of the Photoelectrons and Frequency a) What is the relationship between retarding potential and the kinetic energy of the emitted photoelectrons? b) What is the relationship between the kinetic energy of the photoelectrons and frequency? c) Determine the values and discuss the significance of the following features of the graph of kinetic energy vs. frequency: vertical axis intercept, horizontal axis intercept, and slope. d) Which metal investigated had the highest threshold frequency? What is the wavelength and energy (in eV) of this…A hydrogen atom, initially at rest, absorbs an ultraviolet photon with a wavelength of λ = 169.8 nm. ▼ Part A What is the atom's final speed if it now emits an identical photon in a direction that is perpendicular to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units. .0 Value Submit ΜΑ Part B Units Request Answer μA What is the atom's final speed if it now emits an identical photon in a direction that is opposite to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units. ? Q Search P Pearson Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | ט 7:22 12/11/2
- Calculate the wavelength of a photon emitted when singly ionized helium (He+) transitions from the n = 3 to n = 2 state. The emitted photon has a wavelength of 0.164 nm. A photon is emitted when doubly ionized helium (He++) recombines with an electron to form He+ in the n = 2 state. How does the wavelength of the resulting photon compare to the answer from the previous problem? A. The wavelength is longer in this case because the change in energy (ΔE) is smaller. B. The wavelength is shorter in this case because the change in energy (ΔE) is smaller. C. The wavelength is longer in this case because the change in energy (ΔE) is greater. D. The wavelength is shorter in this case because the change in energy (ΔE) is greater. E. The wavelength is the same because both cases end with He+ in the n = 2 state.When a beam of atoms emerges from an oven at the absolute temperature T, the most probable de Broglie wavelength for a given atom is Amp h /5mkT In this expression, m is the mass of an atom, and k is Boltzmann's constant. Part A What is the most probable speed of a hydrogen atom emerging from an oven at 400 K ? Η ΜΕ ΑΣΦ 跖 0 ? Ump = Submit Request Answer km/sPart A Applying the Bohr model to a triply ionized beryllium atom (Be³+, Z = 4), find the shortest wavelength of the Lyman series for Be³+. Express your answer using four significant figures. ΠΫΠΙ ΑΣΦ λ = Submit Request Answer Part B |AE| = Applying the Bohr model to a triply ionized beryllium atom (Be³+, Z = 4), find the ionization energy required to remove the final electron in Be³+. Express your answer using three significant figures. 5 ΑΣΦ Submit ? Request Answer nm ? eV
- You decide to roll a 0.1-kg ball across the floor so slowly that it will have a small momentum and a large de Broglie wavelength. If you roll it at 0.001 m/s, what is its wavelength? How does this compare with the de Broglie wavelength of the high-speed electron in the problem 1? problem1 Consider the de Broglie wavelength of an electron that strikes the back face of one of the early models of a TV screen at 1/10 the speed of light. Show that the electron wavelength is 2.4 × 10−11 m.For the purpose of this exercise, we consider the Earth as a blackbody at a temperature of 300K. a. Assuming that it is spherical with a radius equals to 6370 km, calculate the total amount energy emitted by the Earth (Hint: The total amount of energy emitted by a surface = amount of energy emitted per unit area x area of the surface). b. What wavelength range would you recommend to measure radiation emitted by the Earth using a satellite mounted sensor?The Cold Light of Fireflies Fireflies are often said to give off "cold light." Part A Given that the peak in a firefly's radiation occurs at about 5.4 x 1014 Hz, determine the temperature of a blackbody that would have the same peak frequency. Express your answer using two significant figures. ΜΕ ΑΣΦ 0 ? T = Submit Request A power. K