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Physical Science Test9

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Across
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The clarinet belong to this group of instruments
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A change in sound frequency caused by an object's motion
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Device that uses microwaves to measure the distance and direction of faraway objects
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A mixture of all colors
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Visible spectrum
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Measure of how well a machine converts input work to output work
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SI unit of force
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"packets" of energy
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Rate of work
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Most powerful form of electromagnetic radiation
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Light that consists of a single frequency
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Twinkling of stars
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Intensity is the ____ of a sound wave
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When 2 notes interfere unpleasantly
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Spreading out of a wave after passing through a narrow opening
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A lens that is curved outward
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Multiplication of force by a machine under ideal conditions
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Effects of frequency on the ear
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Highest frequency of visible spectrum
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The theory based on the ideas that all motion is relative to some reference point and that the (c) is constant in relation to any observer
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Class ___ levers have the input force btwn the fulcrum and the output force
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"heat rays"
Down
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Dark fringe produced by destructive interference
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A beam of light containing waves that all vibrate in the same direction
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Sound heard after reflecting off an object
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High frequency waves used to "see" inside solid objects
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Lowest frequency of visible spectrum
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Series of organized sound waves with specific pitches that are deliberately arranged
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Low frequency waves used for communication
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Cyan, magenta, &____ are subtractive primary colors
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Technique used for communication through narrow glass cables
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Combined effects of 2+ vectors
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Electrons are knocked loose from certain metals
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The general theory of relativity is the idea that ____ is an effect of the geometry of space
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Friction that keeps stationary objects stationary
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Theory stating light exists as particles and waves
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Process that produces colors by interference of reflected light
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Vector representing change in object's position
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Violent compression pulse caused by an object moving faster than the speed of sound
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Light fringe produced by constructive interference
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Demonstrated light consists of electromagnetic waves
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Unit used to measure sound intensity
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Waves that exist in 3 forms