Please help I will mark Brainliest so watching a Bill Nye video and I'm not understanding this question ((What fluid is used to change the pressure in cars that raise and lower due to a hydraulic pressure lift?))
https://www. yout. ube. com/watch?v=VDGZGGlc5Tg&t=509s< br /> take off the dot between you and tube
( the part of the question start in min 6:00)

What are similarities and differences of reflection, refraction, diffraction and absorption?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

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?