A hydraulic lift has two connected pistons with cross-sectional areas 15 cm2 and 620 cm2. It is filled with oil of density 740 kg/m3. 1) What mass must be placed on the small piston to support a car of mass 103 kg at equal fluid levels?
2) With the lift in balance with equal fluid levels, a person of mass 60 kg gets into the car. What is the equilibrium height difference in the fluid levels in the pistons?
3) How much did the height of the car drop when the person got in the car?

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.