Friday, March 09, 2018

Edible Electronics? Lasers are Bringing "Super Material" Graphene to Everyday Surfaces

This may be the only photo you’ve ever seen of researchers proudly displaying a university-branded potato and coconut.

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Wednesday, March 07, 2018

Quick Physics Fix: Why Metal Feels Colder

I want you to try something: Find an object nearby that's made of metal, and something else made of wood or plastic. Put a hand on each. Which one is colder?

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Tuesday, March 06, 2018

Fighting Fire with Physics

On average, about 8 million acres of land burns each year from wildfires. Big fires can reduce forests and grasslands to ash and can destroy homes and lives. Sadly, up to 90 percent of wildland fires in the United States are caused by humans’ carelessness, like unattended campfires, burning trash or waste, tossed-out cigarettes, and arson. The remaining 10 percent are usually started by lightning. Controlling and fighting fires isn’t easy. But knowing the science behind a burning blaze helps firefighters tackle the heat and flames to help save property, land and lives.

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Thursday, March 01, 2018

A Step toward Computing at the Speed of Light

Researchers have come up with a blueprint for a small and tunable device that can control the flow of light. Because it’s much tinier than existing technology, the invention could help shrink optical equipment to the nanoscale, and even enable superfast computers that run on photons instead of electrons. The results will be published in the journal Physical Review Letters.

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Tuesday, February 27, 2018

What Happens Beyond "Absolute Hot"?

Can temperature drop below absolute zero? What happens then? Does it pop out at the other end of the thermometer like Pac-Man and become infinitely hot? Well, kind of, and the seemingly wacky concept is actually surprisingly common in physics.

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Friday, February 23, 2018

The Joy of Physics: Kitchen Mysteries

As regular readers of the site know, we try to take time each week to answer an interesting or informative question that lands in our "Ask a Physicist" inbox. Part of the reason why we do this is to make sure that we're addressing your urgent questions and wild what-ifs, but it's also to demonstrate the amazing things you can do with physics. It's almost a superpower, a kind of "second sight" that lets us understand things that would otherwise be frustrating puzzles.

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Wednesday, February 21, 2018

Suddenly Springtime: the Nonlinearity of Seasons

Why does a change in the seasons always seem to creep up on us? Winter has a way of seeming like it'll never end, like every day closer to springtime brings only another minute of sunlight—and then, nearly all at once, you're enjoying a sunset at 7 PM in nothing more than a light jacket.

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Tuesday, February 20, 2018

Just What IS a "Quantum"?

Quantum is one of those words that's a godsend if you're a lazy science-fiction author in need of a plot device, or someone trying to scam people into buying your crappy, overpriced jewelry. It evokes scientific knowledge and mystery all at once; it lets things be in two places at the same time, or jump to alternate universes.

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Friday, February 16, 2018

Ask a Physicist: How Many Calories are in that Sunbeam?

Last week, Joe from Massachusetts wrote in to ask:

Life is possible through the transfer of the sun's energy, through photosynthesis, and animals eating and us eating them. Is it possible to measure how much energy a person receives from the sun in order to live an average life, say 85 years being the average? Tall order, yes?

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Thursday, February 15, 2018

Wrestling the Demon: the Physics of Free Will

At the intersection of physics and philosophy, there's a question that's weighed on the minds of great thinkers for centuries: Is there truly such a thing as free will? When we make a choice, are we fundamentally any different than a calculator "choosing" which segments of its display to light up when the = button is pressed?

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