Have you ever chewed on a wintergreen mint in front of a mirror in the dark? If you have, you may have noticed some sparks of light coming out of your mouth as you chewed on the candy; and, without knowing it, you have experienced a physical phenomenon called triboluminescence. In this problem you will analyze some of the key elements of triboluminescence in wintergreen candies. When you break a sugar crystal with your teeth, energetic electrons, released by the broken chemical bonds, collide with nitrogen molecules in the air. As a result of these collisions, the electrons in the nitrogen molecules jump to a state of higher energy; when they decay to their ground state, radiation is emitted. Part A Imagine that an electron in an excited state in a nitrogen molecule decays to its ground state, emitting a photon with a frequency of 8.88×1014 Hz. What is the change in energy, AE, that the electron undergoes to decay to its ground state? Express your answer in electron volts to three significant figures. ► View Available Hint(s) ΔΕ = 15| ΑΣΦ ? eV

In the Millikan oil drop experiment, the charge of an electron is measured by placing an ionized oil drop of mass, m, and net charge, e, between the conducting plates of a parallel plate capacitor that produces a vertically downward electric field as shown in the diagram below. If the electron is in static equilibrium between the plates, which of the following is the correct expression for the electron charge of magnitude e? The voltage difference between the capacitor plates is V and the distance between the plates is d.                                                                                                   a. V/(mgd)   b. mgV/d   c. d/(mgV)   d. Vd/mg   e. mgd/V

A carbon nucleus and an iron nucleus are initially located 7.37 nm apart from one another. How much work would it take to move the carbon nucleus to a new distance of 1.75 nm from the iron nucleus?     68.5 eV     97.8 eV     117.4 eV     156.5 eV

One form of nuclear radiation, beta decay, occurs when a neutron changes into a proton, an electron and a neutral particle called a neutrino. When this change happens to a neutron within the nucleus of an atom, the proton remains behind in the nucleus while the electron and neutrino are ejected from the nucleus. The ejected electron is called a beta particle. One nucleus that exhibits beta decay is the isotope of hydrogen 3H, called tritium, whose nucleus consists of one proton (making it hydrogen) and two neutrons (giving tritium an atomic mass m = 3u). Tritium is radioactive, and it decays to helium. Suppose an electron is ejected from a 3H atom, which has a radius of 1.000×10-14 m. The resulting 3He atom has the same radius as the 3H atom. What is the escape velocity of the electron ejected from the process? Note: Your answer may be larger than the speed of light which is okay in this scenario. To solve this problem correctly we would need to use special relativity.

You have an atomic nucleus with 6 protons at x = 5.2 Angstroms on the x-axis. How much work would it take to bring in ANOTHER nucleus with 5 protons from 1 m away and place it at y = 2.3 Angstroms on the y-axis?     17.8 eV     44.6 eV     -31.3 eV     75.9 eV

A Piezoelectric material with d = 250×10"mV¯'and E =1000 is in the form of a cylinder of length and diameter 10 mm and 3 mm respectively. Calculate the force to generate spark in the air gap of breakdown voltage 3.5 kV. (a) 85.0 N (b) 87.6 N (c) 90.0 N (d) 80.5 N

The following image is of a voltmeter, which measures electric potential, in volts (V).         A:A: What is the smallest increment on the voltmeter? B:B: What is the uncertainty? Select two answers: one for question AA and one for question B.

Consider a polar molecule such as water, which has an electrical dipole moment of 6×10-30 Cm. Suppose we place such a molecule in an external electric field of 3.5×10-6 N/C. What is the difference in potential energy between the dipole moment being parallel to and anti-parallel to the electric field?

I have placed an electron at the origin. The grid spacing is 1 Angstrom per small square. Now place an atomic nucleus with 13 protons on positive x-axis, at x = 4.2 Angstroms. How much work did it take you to bring this nucleus in from 1 m away?       53.4 eV     35.6 eV     44.5 eV     26.7 eV

In the Bohr model of the hydrogen (H) atom, the electron moves on a circular path (orbit) around the nucleus,which consists of a single proton. In the ground state of H (the lowest energy level of H), the electron orbitsthe proton at a distance of 0.529 A (or 5.29 × 10^−11 m; 1 A˚ = 10^−10 m) with a linear speed of 2.19 × 10^6 m/s.(a) What is the angular speed of the electron?(b) How many orbits around the proton does the electron make each second?(c) What is the electron’s centripetal acceleration?