
A charge of coulombs
is placed at each corner of a square 1 millionth of a meter on a side. The
direction of the force on any of the four charges will be outward along the
line passing through the center of the square and the charge being
considered. What will be the magnitude of the force on each charge? (Express
your answer to 2 decimal places using scientific notation in the form 1.22e6
where this would be 1220000.)




How many protons are required to make up a charge of x10^{12}C?




A metal sphere has a radius of 10 cm. electrons
are sprayed on 10 square centimeters of the sphere's surface. After 10
minutes, how many electrons are there on each square centimeter?




Two charged spheres whose centertocenter distance is meters
have charges Q_{1}= 50 microC and Q_{2}=35 microC. What is
the force between them, to the nearest tenth of a Newton?




Two point charges Q_{1} and Q_{2},
respectively, are separated by .3 meters. If the Coulomb force between them
is .21 N and Q_{1}=
times Q_{2}, what is Q_{2} to the nearest hundredth of a
microC?




A water droplet of radius meters
remains stationary in air.If the electric field of the Earth is 150 N/C, how
many excess electron charges must the droplet have? (Express your answer in
scientific notation to two decimal places.)




Two charges are arranged on the x axis so that there is a
positive charge of 3.5x10^{6} at the origin and a negative charge of
2.5x10^{6} located centimeters
to its right.To the nearest cm, where on the x axis should a positive charge
be placed so that the net force on it is zero?




A proton is placed between the plates of a charged
capacitor so that it experiences an electric force of Newtons.
What is the strength of the electric field? (Express your answer in
scientific notation to two decimal places.)




Three identical charges of 50 microC are arranged at the
points of an equilateral triangle meters
on a side. To the nearest tenth of a Newton, what is the net force on each
charge?




In the previous problem, what is the force that one charge
exerts on another?


