What is a buffer and how can it reduce human impact on water pollution?

Use the drop-down menu to complete the statement. an electron in the first energy level of the electron cloud has an electron in the third energy level.a. a lower energy thanb. a higher energy thanc. the same energy as

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000