Physics
Energy may seem to disappear, but there’s a law against that
When a ball rolls to stop or a phone battery dies, it’s energy didn't vanish — it just morphed to another form. Energy is always conserved.
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
- Tech
New device can harvest clean energy from humid air anywhere
Unlike solar power, this new source of electricity is available day or night.
- Physics
Shouting into the wind may seem futile — but it’s really not
Sending a sound upwind, against the flow of air, actually makes the sound louder — only it doesn’t sound that way to the person making the noise.
- Materials Science
Let’s learn about piezoelectric materials
Piezoelectric materials turn mechanical energy into electrical energy — and vice versa.
- Physics
Scientists Say: Voltage
Voltage is a measure of how much electricity is available to power devices.
- Physics
Scientists Say: Radiation
Radiation is the motion of energy through space as waves or particles.
- Animals
Analyze This: Ropes restore a gibbon highway through a rainforest
When endangered Hainan gibbons started making risky leaps across an area mowed down by a landslide, researchers provided them a rope bridge.
- Climate
Let’s learn about solar power
Solar power is a way to harness energy from the sun, and lessen our reliance on fossil fuels.
- Materials Science
Will 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.
- Physics
A 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.
