Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Question
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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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
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?
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.
Chapter 3 Solutions
Introduction To Health Physics
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Prob. 3.4PCh. 3 - Calculate the current due to the hydrogen electron...Ch. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - If 9 g of NaC1 were dissolved in 1 L of water,...Ch. 3 - Prob. 3.24PCh. 3 - What is the binding energy of the last neutron in...Ch. 3 - Prob. 3.26PCh. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.30PCh. 3 - Prob. 3.31PCh. 3 - Prob. 3.32PCh. 3 - What is the binding energy of the last neutron in...Ch. 3 - Prob. 3.34PCh. 3 - Prob. 3.35PCh. 3 - Prob. 3.36PCh. 3 - Prob. 3.37PCh. 3 - Prob. 3.38PCh. 3 - Prob. 3.39PCh. 3 - Prob. 3.40PCh. 3 - Prob. 3.41P
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