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2 cards from this section. Quick, good the night before a test.
What causes a syringe to push liquid out?
Think about the action of the plunger.
Why do drinking straws work?
Consider what happens when you suck on a straw.
What principle explains how syringes move liquid?
Remember how pressure differs in a syringe.
True or False: Dams have thinner walls at the top than at the bottom.
Think about the pressure of water with depth.
A hydraulic press with a small piston of diameter 2 cm exerts a force of 100 N. What force can it exert on a large piston of diameter 10 cm?
Remember: Area = πr².
A dam is built to hold back a water depth of 15 m. Calculate the pressure at the base of the dam.
Use the pressure formula, considering the water density and gravity.
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