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A test charge of +2 micro C is placed halfway between a charge of +6 micro C and another +4 micro C sperated by 10cm.
A) what is the magnitude of the force on the test charge?
B) what is the direction of this force (away from or toward the +6 micro C charge)?
A 4.9 cm tall object is placed 25 cm in front of a spherical mirror. It is desired to produce a virtual image that is upright and 3.9 cm tall. Where is the image located? What is the focal length of the mirror?
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