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18 Cards in this Set
- Front
- Back
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What is the difference between the mass of a body and the weight of a body?
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The mass of the body is the measure of the quantity of matter that the body contains, and it does not change. The weight of a body is the force that attracts toward earth.
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How are derived units constructed?
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They are based on combinations of two or three fundamental units expressed as some combination of these units. For examples, the watt could be written as joule per second.
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What action must be applied to an object to overcome inertia?
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A push or pull that exerts a force on the body.
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What is meant by acceleration?
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An increase or decrease in speed and/or a change in direction of motion.
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Why is force considered a vector quantity?
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Because it has both direction and magnitude.
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How is the density of a substance described?
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It is its weight per unit volume
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Moving bodies have energy bcause they can do work. What term describes the energy of mass in motion?
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Kinetic energy
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What gives a substance its distinguishing characteristics?
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The combination and arrangement of the subatomic particles.
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How is the atomic weight of an element determined/
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By the number of protons in its nucleus
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The outer electron shell of each atom of an element is completely filled. What type of element is this?
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Inert
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Name the smallest unit that exhibits the distinguishing characteristics of a compound.
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Molecle
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In forming a compund what part of the atom changes?
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The electron outer shell only. There is no change in the nucleus of either atom, and the total number of electrons hasn't changed, they've been rearranged
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List the advantages of liquids as applied to aviation.
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To study the kinetic theory of gases
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list the absolute zero points on the Kelvin and Celsius scales.
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a. 0 Kelvin
b. -273 degrees celcius |
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Charles' law states that ________.
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"all gases expand and contract in direct proportion to the change in the absolute temperature, pro vialed the pressure is held constant."
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Describe the point of an object that is its center of gravity.
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The point where a single force, equal to the gravitational force and driected up, sustains the body at rest.
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What type of force is an accelerating force applied to the center of gravity of a body so that the body is accelerated with no rotation?
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A translational force
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When does an object have potential energy?
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When it can do work, such as a wound clock spring or a cylinder of compressed gas.
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