Batteries are made of two metals with different electron affinities. what does the phrase “electron affinity” mean and how does this affinity affect the voltage of the battery?

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

In a system, when potential energy decreases, then entropy also decreases. true false

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?