What word describes a material which maintains a magnetic field after an external field is removed?

Ferromagnetic
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Related trivia

What kind of power do sailboats use?
Wind
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What are the ends of a bar magnet called?
Poles
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What is a body's resistance to changes in motion or speed called?
Inertia
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What does splitting a laser light into two beams through a silver mirror make?
Hologram
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What constant is equivalent to 96,485 coulombs per mole of electrons?
Faraday
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What is the irregular and instantaneous motion of air called?
Turbulence
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What is water in its solid form called?
Ice
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If you're talking about electricity, what does "DC" stand for?
Direct Current
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What tool do people at sea use to measure distance with echoes?
Sonar
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What liquid is a fuel commonly used in automobiles?
Gasoline
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How many grams are in a pound?
454
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What is the anti-matter equivalent of an electron?
Positron
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How much would a 150-pound person weigh at the center of the earth?
Nothing
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If you throw a ball in the air, what curve does it trace out?
Parabola
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What is the scale used to measure tornadoes?
The Fujita Scale
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What was the first sound-recording device called?
Phonograph
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What is the term for the capacity of a body or system to do work?
Energy
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What is the opening of a lens, which controls the amount of light?
Aperture
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What type of lens has a thin middle and makes objects appear smaller?
Concave
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To which part of physics does the Archimedes' Principle refer?
Buoyancy
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What sort of electricity do you get when you rub two balloons and they stick together?
Static
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Masses are to Newton's Gravitational Law as charges are to what?
Coulomb's Law
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What unit is resistance measured in?
Ohm
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What physical constant did Henry Cavendish first determine using two weights and a cantilever?
Gravitational Constant
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