What is the repeated sound when sound waves bounce off other objects called?

Echo
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Related trivia

How many coulombs does one ampere-hour equal?
3,600 Coulombs
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Who was the Clark University physicist responsible for "A Method of Reaching Extreme Altitudes"?
Robert Goddard
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What does splitting a laser light into two beams through a silver mirror make?
Hologram
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What does the word "lodestone" mean?
Leading Stone
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What is the main form of energy produced by a laser?
Light
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The Bernoulli Effect concerns what physical system?
A Moving Fluid
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What is the term for the capacity of a body or system to do work?
Energy
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How many watts is one horsepower?
746 W
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What are the component parts of a battery called?
Electric Cells
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What are the ends of a bar magnet called?
Poles
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What liquid is a fuel commonly used in automobiles?
Gasoline
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How much would a 150-pound person weigh at the center of the earth?
Nothing
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What is the second derivative of displacement?
Instantaneous Acceleration
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What constant is referred to as "The Universe's Clock"?
Speed of Light
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If you throw a ball in the air, what curve does it trace out?
Parabola
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What kind of power do sailboats use?
Wind
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In math, "pi" is equal to?
3.141592654
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What was originally defined as one 10-millionth of the distance from the equator to the North Pole?
Meter
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What is a body's resistance to changes in motion or speed called?
Inertia
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What's the term used to indicate the speed of a lens?
F-Stop
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What word describes a material which maintains a magnetic field after an external field is removed?
Ferromagnetic
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What physical constant did Henry Cavendish first determine using two weights and a cantilever?
Gravitational Constant
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To which part of physics does the Archimedes' Principle refer?
Buoyancy
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What is a space which is entirely devoid of matter called in science terms?
Vacuum
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