Tech
New light-activated coating can kill stubborn germs
Based on graphene, this new material can knock out hard-to-kill germs on contact — even in your mouth.
HS-PS1-3
Plan and conduct an investigation to gather evidence to compare the structure of substances at the bulk scale to infer the strength of electrical forces between particles.
More Stories in HS-PS1-3
- Tech
Magnetic fields melt and re-form new shape-shifting devices
Miniature machines made of gallium and magnetic particles can switch from solid to liquid and back.
- Earth
Analyze This: Salt may quash lightning over the sea
Bits of airborne salt may help raindrops form, removing water from clouds before it can freeze as part of the process that makes lightning.
- Physics
Protons may be stretchier than physicists had thought
Physicists looked at how the quarks that make up protons move in response to electric fields. And they found more movement than expected.
- Math
Why some icicles become scallops not spikes
The newfound — and at times quirky — shapes reflect the density of water surrounding submerged ice.
- Tech
Synthetic trees could tap underground water in arid areas
They also could also help coastal residents mine fresh water from salty sources.
- Materials Science
Take a look at this weird, bendy type of ice
These specially grown threads of ice bend into curves, then spring back when released.
- Chemistry
Explainer: Ions and radicals in our world
When atoms get an electric charge, they act very differently. Now called ions, these are behind many aspects of chemistry, including acids and batteries.
- Chemistry
Explainer: What is an electrode?
An electrode’s name depends on the circumstances. Confused? It may help to consider which electrochemical reaction is natural — and which is not.
- Chemistry
New glue offers to turn any small walking robot into Spider-Man
To climb walls, robot feet need to alternately stick and let go. A novel adhesive can do that. Its stickiness is controlled by electric fields.
