What are TWO costs of using tides for energy? Sorry for the caps, I have been looking through answers and the answers never have 2 costs, only one.

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

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?