Mrs. Lutz's Science Class - Home



Physical Science Unit 3 Study GuideWhich states of matter are considered fluids?What principle are hydraulic machines based on? What is the advantage of using hydraulics?Define each term and be able to apply it to a given situation:Kinetic theory of matterLaw of Conservation of EnergyLaw of Conservation of MassArchimedes’ principlePascal’s principleViscosityBernoulli’s principleBoyle’s lawGay-Lussac’s lawCharles’ lawArchimedes Problems:If a 34 N object displaces 10 N of water when dropped into an overflow can, will it sink or float?A 4 N object displaces 600 mL of water weighing 6 N. Will it sink or float?An object weighing 50 N is dropped into an overflow can. The displaced water is collected in a 100 N beaker. If the weight of the beaker full of water is 120 N, did this object sink or float?Practice Problems:You can exert 50 N of force on a piston with an area of 1.0 m2. If you are trying to lift a machine that weighs 500N, what must be the area of the piston on which the machine rests?An engineering student wants to build a hydraulic pump to lift a 1,815 N crate. The pump will have two pistons connected via a fluid chamber. The student calculates that a force of 442 N will be exerted on the small piston, which will have an area of 0.5 m2. What must the area of the large piston be to exert the desired force?A hydraulic lift is used to lift a heavy machine that is pushing down on a 5.0 m2 piston with a force of 1,500 N. What force needs to be exerted on a 2.0 m2 piston to lift the machine? An engine shop uses a lift to raise a 1,784 N engine. The lift has a large piston with an area of 3.2 m2. To raise the lift, force is exerted on a small piston with an area of 0.6 m2. What force must be exerted to raise the lift?People who are angry sometimes say that they feel as if they’ll explode. If a calm person with a lung capacity of 3.5 liters and a body temperature of 309 K gets angry, what will the volume of the person’s lungs be if their temperature rises to 312 K? Based on this, do you think it’s likely they will explode?What is the new pressure if a 12.0 L container at 150.0 kPa is expanded until the volume is 60.0 L?A container of gas at 200 K and 101 kPa increases in pressure to 235 kPa. What is the new temperature of the gas? ................
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