Physical Science Unit 2 Vocabulary

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Density
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Terms in this set (24)
Density
the degree of compactness of a substance.
DensityFormula
D=m/v
Pressure
the amount of force exerted per unit area of a surface
Specific Heat
The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celcius
Specific Heat Formula
q=mc∆T
pascal's principle
pressure applied to a fluid is transmitted throughout the fluid
Archimedes Principle
the buoyant force on an object is equal to the weight of the fluid displaced by the object
Buouyancy
Tendency of an object in a fluid or to rise or sink due to density differences with its surroundings.
The higher the specific heat... (4 j/gC)
the more heat needed to change its temperature (slower heating/cooling)
The lower the specific heat... (0.2 j/gC)
the less heat needed to change its temperature (fast heating/cooling)
conductorA material that conducts heat wellCoolingNegative Specific Heat Valuepositive buoyancyThe buoyant force is greater than the force of the object, and the object floats.negative buoyancyThe force of the object is greater than the buoyant force, and the object sinks.neutrally buoyantbuoyant forces are equal to weight of object. It does not sink nor floatHot Air Balloons Fly....because the less dense hot air (inside the balloon) floats on the more dense cold air.If objects have the same volume, the more dense object will have alarger massif objects have the same mass, the less dense object will have alarger volumeGasThe least dense state of matterSolidThe most dense state of matterswim bladderan air-filled sac near the spinal column in many fishes that helps maintain buoyancybuoyant force is...equal to the weight of the displaced waterWaterThis substance can absorb or release large amounts of heat with relatively small changes to its own temperature.To Measure Pressure...Measure Particle Collisions with Walls of Container