I am not understanding a concept in electronics. When people say positive and negative charges I get confused as electrons are negatively charged and if they become positive they would be antimatter, which doesn't happen. So if someone could clear up why people say positive and negative charges I would be grateful.

3.2x10^7

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

a. are