Physics

  1. Physics

    Explainer: How do mass and weight differ?

    Learn why these terms aren’t the same and which to use where. And should you report your results in kilograms? Pounds? If in doubt, try using newtons.

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  2. Physics

    Why some icicles become scallops not spikes

    The newfound — and at times quirky — shapes reflect the density of water surrounding submerged ice.

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  3. Space

    Wild art? No, it’s a radio image of the heart of our Milky Way

    Eyelash-like radio filaments accent the brightest feature in this image — a supermassive black hole.

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  4. Environment

    Clothes dryers may be a major source of airborne microplastics

    Scientists thought washing machines were a leading contributor of microplastics. Now it appears dryers may be an even bigger problem.

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  5. Physics

    Analyze This: Masks cut the distance that spit droplets fly

    Both cloth masks and surgical masks reduced the distance spit traveled from a person talking or coughing by at least half, compared with no mask.

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  6. Physics

    Explainer: Gravity and microgravity

    The force of gravity holds us on the ground, keeps planets in orbit and extends throughout space. A very weak gravitational pull is called microgravity.

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  7. Ecosystems

    Scientists Say: Decay

    This word can refer to rotting flesh or the transformation of radioactive atoms.

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  8. Physics

    Scientists Say: Voltage

    Voltage is a measure of how much electricity is available to power devices.

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  9. Materials Science

    Let’s learn about glass

    Unlike the atoms in other solids, the atoms in glass don’t exist in an orderly crystal structure. They’re more jumbled up, like the atoms inside liquids.

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  10. Tech

    This crumb-sized camera uses artificial intelligence to get big results

    Researchers have developed a camera the size of a coarse grain of salt that takes amazingly clear photos.

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  11. Space

    Explainer: Telescopes see light — and sometimes ancient history

    Different kinds of telescopes on Earth and in space help us to see all wavelengths of light. Some can even peer billions of years back in time.

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  12. Chemistry

    Snail slime + gold could boost the power of sunscreens and more

    These two strange ingredients could make skin-care products that are better for both our skin and the environment.

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