Which is the largest galaxy in our local group?

A( developed during the process of technology design

In which of these cases are the two wave points considered to be in phase with each other?

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?