Physics
- Physics
Scientists Say: Acceleration
Acceleration is a change in velocity. That could mean a change in speed or in direction.
- Physics
Scientists Say: Radiation
Radiation is the motion of energy through space as waves or particles.
- Physics
Let’s learn about light
Light is a form of energy that moves in waves. Some light comes in waves we can see. Other waves are invisible to us — but still affect our world.
- Animals
Butterflies use jet propulsion for quick getaways
If you have ever tried to catch a resting butterfly, you know they are surprisingly difficult to nab. A new study helps explain why.
- Math
Beyond crystal balls: How to make good forecasts
Science shows mounds of data and some math are key to predicting future events.
- Physics
New ‘ionic wind’ can dry foods while preserving nutrients
Researchers have come up with a way to increase the energy efficiency of a drying technique, possibly making it ready for prime time.
- Chemistry
Extreme pressure? Diamonds can take it
Diamond retains its structure even at extreme pressures, which could reveal how carbon behaves in the cores of some exoplanets.
- Earth
Explainer: What are aerosols?
We may not see them, but tiny particles and droplets cloud the air, affecting its properties. Some may be pollutants, others all-natural products.
- Materials Science
Super-absorbent swab could curb errors in COVID-19 testing
A new super-absorbent swab could cut down on false negatives from COVID-19 testing. And that could help slow spread of the disease.
- Physics
Scientists Say: Piezoelectric
Piezoelectric materials produce an electric voltage when they are bent or squished. This can let us harvest electricity from movement.
- Physics
Physicists have clocked the shortest time span ever
The experiment revealed how long it takes light to cross a hydrogen molecule: just a couple hundred zeptoseconds.
- Physics
What did you say? Fabric masks can really muffle voices
Some types of face masks muffle speech more than others — something that teachers should take into account.
