How many electrons (added or removed) are necessary to produce a charge of -4mc?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit

According to social exchange theory, altruistic behaviors benefit the individual who performs them.