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 2, Problem 2.8P
To determine
How many volts must be applied across the plates if the droplet is to remain suspended in the space between the plates if a 1-micron-diameter droplet of oil, whose specific gravity is 0.9, is introduced into an electric field between two large horizontal parallel plates that are 5-mm apart, across which there is a potential difference of V volts, if the oil droplet carries a net charge of 100 electrons?
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Question 1
a) In J. J. Thomson experiment (1897), an electron moving horizontally with a
constant speed vo enters in between the horizontal plates of a capacitor. The
electric field strength between the plates of length L and distance d, is E.
The vertical deviation of the electron at the moment of exit from the field
region is measured to be Y. Derive the expression giving the electron's
charge to mass ratio, i.e. e/m to be 2v,Y/CEL). (Recall that Thomson
received Nobel Prize for his achievement.)
b) Calculate e/m, knowing the following data. E=1.6x10* Newton/Coulomb,
L=10 cm, Y=2.9 cm, v=2.19x10* km/s. (Be careful to use coherent units.)
The electric field around an isolated electron has a certain strength of Eo at a distance of 1 cm from the electron. The electric field strength 2 cm from the electron is ____ ?
What does this mean?
If a proton and electron are released when they are 2.0 m apart, find the initial acceleration of electron (in m/s2).
The answer (in fundamental SI unit) is ___________ (type the numeric value only)
Chapter 2 Solutions
Introduction To Health Physics
Ch. 2 - Two blocks of mass 0.1 kg and 0.2 kg approch each...Ch. 2 - A bullet whose mass is 50 g travels at a velocity...Ch. 2 - Compute the mass of the Earth, assuming it to be a...Ch. 2 - An automobile weighing 2000 kg and going at a...Ch. 2 - A small electrically charged sphere of mass 0.1 g...Ch. 2 - A capacitor has a capacitance of 10F . How much...Ch. 2 - A small charged particle whose mass is 0.01 g...Ch. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - A current of 25 mA flows through a 25-gauge wire,...Ch. 2 - An electron starts at rest on the negative plate...Ch. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - (a) A 1000-MW(e) nuclear power plant operates at a...Ch. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27PCh. 2 - The specific heat of water in the English system...Ch. 2 - Prob. 2.29PCh. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - How many cubic meters of water must fall over a...Ch. 2 - (a) Calculate the speed of a 25-MeV proton. (b)...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Calculate the speed of a (a) 0.5-MeV electron and...Ch. 2 - How much sub-butuminous coal (20,000 kJ/kg) would...Ch. 2 - Prob. 2.40PCh. 2 - How much oil (138,690 Btu/gal) would it take to...Ch. 2 - How much oil (138,690 Btu/gal) would it take to...Ch. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - Prob. 2.45PCh. 2 - Prob. 2.46PCh. 2 - Prob. 2.47PCh. 2 - Prob. 2.48PCh. 2 - Prob. 2.49P
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