This is science they dont have the selection for science Which option describes mechanical weathering?
Select one:

1.Carbon dioxide combining with water.

2.The freezing of solid matter.

3.Acid rain falling to the ground.

4.Rocks being broken apart.
answer ASAP timed test!!! I will mark brainliest for who ever answers 1st and correct!

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?