Exam 4: Physics of Matter

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The central core inside an atom is the neutron.

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You press a stick that has a varying cross-sectional area horizontally between the palms of your hands. The area of the stick pushing against your left palm is twice the area of the stick pushing against your right palm. -The pressure on your left palm is __________ the pressure on your right palm.

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The buoyant force that keeps a ship afloat is an example of Pascal's principle.

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Atmospheric pressure at an altitude of 10,000 m is exactly half of what it is at 5,000 m.

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An atomizer works because of

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The element symbol C stands for cobalt.

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The altimeter in an aircraft is an aneroid barometer.

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A rock brought back from the Moon weighs 4 pounds and has a volume of 0.02 cubic feet.What is the rock's weight density?

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Gravity causes the pressure in the ocean to vary with depth.

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A device that measures absolute air pressure is called a

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In a flowing fluid,the pressure where the fluid is moving slower is higher than the pressure where the fluid is moving faster.

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Most modern aircraft use hydraulics systems to move the control surfaces on the aircraft.This is an example of using Bernoulli's principle.

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The uncharged particle inside an atom is

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A person weighing 200 pounds stands on snowshoes.If the area of each snowshoe is 400 square inches,the pressure on the snow is

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How many elements have been identified?

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A tire pressure gauge reads 30 psi when the atmospheric pressure is 14 psi.The net force on 2 square inches of the tire is 60 lbs.

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The cabin pressure of a passenger jet cruising at high altitude (30,000 ft)is about 1 atm.and the pressure outside is about 0.3 atm.What is the outward force acting on a door measuring 1 meter by 2 meters? (Hint: convert metric to English units in this problem using the conversion factor m2 to ft2 in the Table of Conversion Factors)

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As an aircraft gains altitude,the outside air pressure __________ with height.

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When an object floats in a liquid,the buoyant force is larger than the weight of the object.

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The buoyant force that keeps a ship afloat is an example of

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