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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What is the magnitude of the repulsive force between a 3.4 mC charge and a 6.3 mC charge if they are separated by a distance of 93 centimeters? Report your answer kN rounded up to the tenths place
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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- In the Millikan oil drop experiment tiny charged oil droplets generated by a spray are allowed to fall under gravity through a hole in a top electrode, T, towards a bottom electrode B separated from T by 1 cm. When a holding voltage Vh = +0.25V is applied between T and B the droplets are seen to be suspended motionless between the electrodes. What is the specific charge of the droplet q/m? Select one: a. 1.5 C/kg b. 2.7 C/kg c. 0.16 C/kg d. 0.392 C/kgarrow_forwardHow many electrons have to be moved by a car battery containing 7.20×105 J at 12 V to reduce the energy by 1%?arrow_forwardChase and Kadri consider the following values, which are part of a set of experimental data for a Millikan oil-droplet experiment. b = 1.48 ✕ 10−10 kg/sd = 0.016 m?oil − ?air = 0.882 g/cm3r = 3.0 ✕ 10−7 mV = 5000 V What is the terminal speed for a droplet of charge 4e?To what value should the voltage be adjusted so that the droplet is suspended between the two plates? Varrow_forward
- On which level within this parallel plate apparatus would an electron have the most potential energy. What is the minimum work needed to move a proton from Level A to Level B in joules?arrow_forwardIn a Millikan oil-drop experiment, a particular oil drop weighs 4.37×10^−14 N. The parallel plates are separated by a distance of 1.80 cm.When the potential difference between the plates is 546 V, the drop is suspended. a. What is the net charge on the oil drop? b. If the upper plate is positive, how many excess electrons are on the oil drop?arrow_forwardA charged droplet is released between 2 vertical plates with an electric field across them. Calculate the deflection (z) of the droplet by the time it leaves the electric field region. You should first calculate the time spent by the droplet accelerating under the action of gravity Droplet mass: 3.5x10-15 kg Droplet charge: 861x10-19 C Gap (d): 0.1 m Length of plates (L): 0.3 m Voltage (VA-VB): 5 V Acceleration due to gravity 9.8 ms-2arrow_forward
- In an experiment replicating Millikan’s oil drop experiment, apair of parallel plates are placed 0.0200 m apart and the top plate is positive.When the potential difference across the plates is 240.0 V, an oil drop of mass2.0 × 10-11 kg gets suspended between the plates. (e = 1.6 × 10-19 C)a. Draw a free body diagram to describe the situation.b. What is the charge on the oil drop?c. Is there an excess or deficit of electrons on the oil drop? How many electrons are in excess or deficit?arrow_forwardOn which level within this parallel status would an electron have the most potential energy? (the choices are in the photos)arrow_forwardThe grid spacing is 1 Angstrom per small square. Now place an atomic nucleus with 4 protons on positive x-axis, at x = 5.2 Angstroms. How much work did it take you to bring this nucleus in from 1 m away? 7.8 eV 15.5 eV 9.5 eV 11.1 eVarrow_forward
- Through how many volts of potential difference mustan electron, initially at rest, be accelerated to achieve awavelength of 0.27 nm?arrow_forwardI have placed an electron at the origin. The grid spacing is 1 Angstrom per small square. Now place an atomic nucleus with 8 protons on positive x-axis, at x = 7.2 Angstroms. How much work did it take you to bring this nucleus in from 1 m away? 20.8 eV 12.0 eV 16.0 eV 8.0 eVarrow_forwardSolar wind is a flow of heavily charged ions emanating from the Sun’s corona. Spectroscopic analysis suggests it contains a density of approximately 5.0 electrons per cubic centimeter (cm3). Given that the elementary charge ? ≈ 1.6 × 10−19 ? and using the combined average of your measured values of Q, determine the charge density of a cubic meter (m3) of solar wind sample as a function of Qarrow_forward
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