College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter1: Introduction: The Nature Of Science And Physics
Section: Chapter Questions
Problem 8PE: The speed of sound is measured to be 342 m/s on a certain day. What is this in km/h?
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Two positive charges each of charge q are fixed on the y-axis, one at
y = d
and the other at
y = −d
as in the figure shown below. A third positive charge 2q located on the x-axis at
x = 2d
is released from rest.
Three positive charges lie along the axes of an x y-coordinate plane.
- Charge q lies a distance d above the origin.
- Charge q lies a distance d below the origin.
- Charge 2q lies a distance 2d to the right of the origin.
(a) Find a symbolic expression for the total electric potential due to the first two charges at the location of the charge 2q. (Use any variable or symbol stated above along with the following as necessary: ke for the Coulomb constant.)
(b) Find a symbolic expression for the electric potential energy of the charge 2q. (Use any variable or symbol stated above along with the following as necessary: ke for the Coulomb constant.)
(c) Find a symbolic expression for the kinetic energy of the charge 2q after it has moved infinitely far from the other charges. (Use any variable or symbol stated above along with the following as necessary: ke for the Coulomb constant.)
(d) Find a symbolic expression for the speed of the charge 2q after it has moved infinitely far from the other charges if its mass is m. (Use any variable or symbol stated above along with the following as necessary: ke for the Coulomb constant.)
V =
(b) Find a symbolic expression for the electric potential energy of the charge 2q. (Use any variable or symbol stated above along with the following as necessary: ke for the Coulomb constant.)
PE =
4keq2√5d
(c) Find a symbolic expression for the kinetic energy of the charge 2q after it has moved infinitely far from the other charges. (Use any variable or symbol stated above along with the following as necessary: ke for the Coulomb constant.)
KE =
(d) Find a symbolic expression for the speed of the charge 2q after it has moved infinitely far from the other charges if its mass is m. (Use any variable or symbol stated above along with the following as necessary: ke for the Coulomb constant.)
v =
Transcribed Image Text:24
d
+-x
2d
d
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