Introduction To Health Physics
Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 3, Problem 3.39P
To determine

Whether or not, the green photon will impart enough energy to ionize the DNA covalent bond.

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Suppose an infrared photon has a frequency of 1.9x1013 Hz. a) How many of these photons would need to be absorbed simultaneously by a molecule with a binding energy of 10.0 eV to break it apart? b) What is the energy, in eV of a y-ray of frequency 2.95 x 1020 Hz? c) What is the largest number of molecules from part (a) that a single such y-ray could break apart?
Your answer is partially correct. A laser emits light at wavelength A = 598 nm in a beam of diameter 3.7 mm and at an energy-emission rate of 5.5 mW. A detector in the beam's path absorbs the beam. At what rate per unit area does the detector absorb photons? Number 1.429048888 Units photons/s-m^2
Coulomb constant, k = 8.987 x 10° N· m2/C2. Vacuum permitivity, eo = 8.854 x 10-12 F/m. Magnitude of the charge of the electron, e = -1.60217662 x 10-19 C. Mass of the electron, me = 9.10938356 x 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb +x Coordinates of three charges in a 2D plane is given as follows: q1 = -45 µC at pi = (17, 17), g2 = 21 µC at p2 = (17, –11) and g3 = 43 µC at p3 = (-15, 13). These coordinates are given in centimeters. a) Compute force on q2 due to qi using the formula F12 = k 12- I component of the force Give your answer to at least three significance digits. y component of the force Give your answer to at least three significance digits. N b) Compute force on q2 due to qi using the formula F12 = kr12. I component of the force Give your answer to at least three significance digits. y component of the force Give your answer to at least three significance digits.
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