Acharged sphere located at the origin of the xy-plane exerts a force of magnitude f on a charged particle located at (+d, 0). the sphere will exert a force f/2 on the particle if the particle is moved to which of the following locations?

a (+2d, 0)
b (+d, +d)
c (+d/2, 0)
d (0, -d)

explain

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds