Physics
Scientists Say: Voltage
Voltage is a measure of how much electricity is available to power devices.
HS-PS3-2
Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as either motions of particles or energy stored in fields.
More Stories in HS-PS3-2
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ClimateLet’s learn about solar power
Solar power is a way to harness energy from the sun, and lessen our reliance on fossil fuels.
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Materials ScienceWill bacterial ‘wires’ one day power your phone?
An accidental discovery helps scientists generate electricity out of thin —but humid — air with bacteria-made protein nanowires.
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PhysicsA contrast between shadows and light can now generate electricity
A new device exploits the contrast between bright spots and shade to produce a current that can power small electronics.
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PlanetsGlass beads help scientists puzzle out how baby planets grow
Researchers have mimicked the first stages of planet formation in the lab. All they needed were glass beads and a catapult.
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Materials ScienceThe future of crystal-based solar energy just got brighter
Researchers have upped the efficiency of layered solar cells that could be printed or painted onto surfaces. Now they are working to make them more rugged.
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ChemistryExplainer: What are acids and bases?
These chemistry terms tell us if a molecule is more likely to give up a proton or pick up a new one.
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PhysicsFamous physics cat now alive, dead and in two boxes at once
Splitting Erwin Schrödinger’s famous — and fictitious — cat between two boxes brings scientists one step closer to building quantum computers from microwaves.
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PhysicsScientists ‘see’ thunder for first time
Scientists have captured the first image of thunder. The map shows the relative strengths of the sound waves emanating from the loud clap.
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TechDigital lighting goes organic
An environmentally friendly lighting technology promises not only to save energy but also to transform our indoor environment.