Physics is a natural science that involves the study of matter and its motion through spacetime, as well as all related concepts, including energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.

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Does GPS use General Relativity?

Sources on the internet claim that the GPS system requires Relativity to work (xkcd). I've searched information about the GPS system, how it works and how it was set up, reading information from many ...
3
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186 views

If the viewable part of lightning goes from the ground up, why does it look like lightning goes from the sky down?

According to here, it seems like the visible portion of lightning comes from the ground up; however I watched some slow motion YouTube videos, and it is clear that the lightning appears to be ...
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131 views

Can a plastic tent keep contaminants out and emulate a safe clean room?

I was reading an article on why opening the cover of a hard drive was a bad idea. In the article, the author mentions that the safest way to open the cover of a hard drive was to do it in a class 100 ...
6
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1answer
772 views

Do water molecules change when you talk to them?

I've heard that saying something nice in front of water changes the water molecules shape into a nice shape and saying something bad in front of it makes the molecules align in a bad order (ugly one). ...
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0answers
118 views

Do directional (not asymmetric) tread patterns reduce hydroplaning?

Treaded tires are better than smooth (slicks) tires in the rain to reduce hydroplaning. What is the evidence the directional tires (not asymmetric tires) give measurably better performance? If you ...
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5answers
10k views

Is the “Back to the future” Huvr board real?

This website is promoting a hovering skateboard. As far as my knowledge can tell, this seems fake. The only two known technologies I know of which can hover like that are magnets and quantum ...
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0answers
155 views

Tensile strength of bone & the bible [closed]

The Bible says that Samson "found a moist jawbone of a donkey, and put forth his hand and took it, and killed with it a thousand men." How many Philistines could one actually slay with the moist ...
5
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3answers
485 views

Do tinfoil hats protect against any sort of radiation?

Delusional conspiracy theorists are commonly portrayed as wearing tin-foil hats to protect against mind-control rays from sinister organisations such as ...
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0answers
182 views

Does time really slow down when travelling at high speed? [closed]

Traditionally a day is defined to be one earth's spin around itself, a year one earth's spin around the sun and the smaller time units subdivisions of these. That, however, is not the scientific ...
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2answers
425 views

Can people run on water?

There have been a few videos around since as far back as 2010 that people can run on water. This is less commonly called Liquid Mountaineering. This is apparently a new sport but I have only ever seen ...
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0answers
680 views

Will wrapping a bottle in a wet paper towel make it chill faster?

Example of the claim: Take a couple paper towels and wrap them around your beer, then douse it in water. It should be soaked but not dripping (you don't want ice forming in your freezer). Air is ...
18
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0answers
441 views

Can the health of an alkaline battery be determined by bouncing it?

I was just sent a YouTube video, which appears to demonstrate that one can determine the "health" of a battery (current voltage, useful lifetime remaining, etc.) by bouncing it on a level surface. A ...
7
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169 views

Is there a letter from Bohr about the 1950 Nobel prize?

César Lattes had some important participation in the discovery of the the pi meson, but the Nobel prize was awarded to Cecil Powell alone. There are claims that Niels Bohr left a letter explaining ...
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1answer
3k views

Did January 2014 American snowfall char and burn when exposed to fire?

This site, ‘Fake Snow’: Videos In Multiple States Show Strange Snow That Doesn’t Melt Normal, Burns, Smells of ‘Plastic’, shows several videos and images of people burning snow they collect from ...
9
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1answer
569 views

Is the 500-mile email case true?

According to the author of this story, an improperly configured email server had too strict timeout settings which effectively limited its communication radius to 500 miles. The author states it's ...
2
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0answers
988 views

Does the Theradome Laser Helmet deliver around 7 J/cm2 to the head?

The Theradome Laser Helmet is claimed by its manufacturers to promote healthy hair growth. In this infographic, they claim it delivers energy to the skull at a concentration of 6.959 j/cm2 - ...
7
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228 views

Could the wristwatch worn by Felix Baumgartner be the first wristwatch to break the speed of sound?

Recently I was really surprised to know that Zenith watch brand claims that because Felix Baumgartner was wearing a specific model of their wristwatch during his famous Stratos Mission freefall that ...
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5answers
80k views

Is this tealight-flowerpot heater more efficient than just tealights?

This article at the Daily Mail describes a small heater based on tealights and flowerpots. It claims that [the system] "make[s] the heating more efficient" (I assume in comparison to just ...
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0answers
272 views

Is this pseudo science or real: code found in superstring [closed]

Video in question: Strange Computer Code Discovered Concealed In Superstring Equations! Problem: no credible looking or sounding site has anything on it. Only bunch of youtube videos. And some sites. ...
7
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1answer
1k views

Has Reidar Finsrud created a perpetual motion machine?

I found some websites claiming a Norwegian artist (Reidar Finsrud) created a true perpetual motion machine. Perpetual motion is a concept that would violate both the first and second thermodynamics' ...
3
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0answers
862 views

Is this a true demonstration of using a stove to power a paper airplane?

The viral YouTube video, (over 1.1m views at the time of positing), How To Make A Paper Airplane Fly Forever - INFINITY PAPERPLANE purports to show a basic paper plane being flown in continuous ...
25
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1answer
885 views

Did this building cause carpet to burn and cars to melt?

The BBC reports that a building with curved glass in London appears to have caused damage nearby as a result of the architecture focusing the sun's rays. Seems plausible enough to me, but is this ...
13
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2answers
2k views

Does the Gravitational constant fluctuate?

Rupert Sheldrake recently had a TEDx presentation removed from the TEDx web-site, for making various controversial claims, basically calling all of science into doubt. I am highly skeptical about ...
8
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1answer
2k views

Do “liquid solar blankets” work to stop heat from escaping a swimming pool?

There are products on ther market that claim to spread a thin layer of proprietary transparent liquid over the surface of your pool to reduce evaporation and thus retain heat. One product is ...
5
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0answers
819 views

Graphene “heat sink” sticker for your mobile phone battery

This product (Japanese language) is claimed to cool down your smartphone, etc, battery by two degrees centigrade - see the photo a little way down the page. It claims to be a graphene-based material, ...
13
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1answer
989 views

Is D-Wave Systems's “D-Wave One” a quantum computer?

D-Wave Systems claim to have produced the first commercial quantum computer: The company's flagship product, the D-Wave One, is built around a novel type of superconducting processor that uses ...
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3answers
466 views

Does physics give a climate sensitivity to carbon dioxide of about 3°C?

A letter to the editor of the Economist from Professor Anders Levermann of the Potsdam Institute for Climate Impact Research stated the following: The IPCC’s range on sensitivity is supported by, ...
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1answer
548 views

Time traveling machine invented?

Yesterday a news said that an Iranian scientist claims to have invented a 'time machine' that will allow one to 'travel' up to 8 years into the future to predict with 98% accuracy the future for any ...
3
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3answers
1k views

Misconceptions about electric theory

Electric misconceptions This is a fairly big question, and is divided into three parts. One part is a separate question. The site lists several common misconceptions, and what the correct way of ...
0
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1answer
460 views

Can HAARP warp space-time? [duplicate]

According to this article A brilliant physicist published a revolutionary paper citing 30 other scientific papers that reveal HAARP has incredible powers far beyond what most investigators of the ...
5
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2answers
2k views

Can a loudspeaker make water stream form a zig-zag flow?

If you watch this Amazing Water & Sound Experiment #2 YouTube video, you can see an amazing effect with water, a sinusoidal signal and a woofer. Is this a true effect due to vibration of the ...
8
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1answer
42k views

Did Canadian company HyperStealth invent an invisibility cloak?

This seemingly legitimate camouflage design company says it invented an invisibility cloak called Quantum Stealth that works by bending light "without cameras, batteries, lights or mirrors." ...
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3answers
6k views

Is there any data on how efficient Tesla wireless power transmission was?

It's widely believed that Nikola Tesla not only demonstrated wireless power transmission but his works in this field were very successful. Wikipedia only says this The electric energy transmitted ...
8
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1answer
1k views

Can the useful lifespan of razor blades be extended by stroking them over jeans?

This article and this video, amongst others, claim that you can extend the useful lifespan of razor blades for a substantial amount (months), if you regularly stroke them over jeans, immediately after ...
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2answers
379 views

Is there an iPhone app that can make corn kernels pop?

I have seen a video on YouTube that clearly shows corn kernels popping when a certain iPhone app is used and the kernels are placed on the iPhone. A friend of mine at work said it is fake. Now, I ...
3
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0answers
1k views

Does HEATTECH heat-generating clothing work?

Uniqlo sells HEATTECH heat-generating clothing. Is this just a marketing gimmick or does this fabric generate heat as advertise?
22
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1answer
3k views

Did/does the US government keep secret papers by Nikola Tesla?

A popular conspiracy theory holds that Tesla invented a free energy device, but that the powers that be prevented him from publishing it, because it would hurt their investments. Of course, free ...
32
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1answer
5k views

Does a column of marching soldiers have to break their rhythm while crossing a bridge to prevent its collapse?

I recently stumbled across this article "Why are soldiers ordered to break their marching steps while crossing a bridge?" (The Times of India) where a claim is made: When soldiers march in three ...
5
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1answer
499 views

Is it possible to gain an edge in roulette through physics?

I just stumbled across the following article: http://genuinewinner.com/science.html, which makes the following claim: There's no way of knowing exactly which number will spin next. And there's ...
10
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1answer
2k views

Did the Large Hadron Collider end up costing 10 billion dollars?

According to the Los Angeles Time (Massive proton collider is a great big hit after all) and The New York Times (European Collider Begins Its Subatomic Exploration) the Large Hadron Collider did end ...
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90 views

Is every 13th wave larger then the rest? [duplicate]

Possible Duplicate: Is the ninth wave the largest? In the movie Kon-Tiki, the crew relies crucially on the claim that every 13th wave (over a reef) is larger then the rest, I have heard ...
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0answers
845 views

Can the EmDrive produce thrust for a spacecraft without propellant? [closed]

This article and the paper “Net Thrust Measurement of Propellentless Microwave Thruster” in the June edition of the journal Acta Physica Sinica published by the Chinese Academy of Sciences talk about ...
3
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0answers
303 views

does observation affecs reality? [closed]

I was watching "the universe series" when one of the presenters was talking about Quantum experiments where they "proved" how observation affected the outcome of certain events, for example when they ...
7
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1answer
571 views

Does the Eneloop battery have lower self-discharge?

In the following pages: What's eneloop? Self-Discharge it is mentioned that the Eneloop battery has has an even lower self-discharge […] in comparison with other high quality ...
10
votes
1answer
1k views

Is it possible to stack liquids of different density scale on top of each other?

I came across q picture on the net and now I'm skeptical that it's possible. I know liquids from different density scale wouldn't mix easily but stacking them on top of eachother with perfectly ...
17
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2answers
2k views

Can a man fall faster than the speed of sound?

I have heard that a man can fall faster than the speed of sound, and survive, by jumping from 36,000 meters; a free fall that, it seems, lasts ten minutes after the jump. Is it true?
4
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2answers
2k views

Do ocean waves come in sets of 7?

I have heard the claim that "Ocean waves travel in groups of seven, and the seventh wave is the biggest of the bunch." Is this fact of fiction?
5
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2answers
866 views

Do commercial airliners go into flat spins if they lose electronics?

In movies and television, commercial airliners that have lost electronics often go into flat spins and inevitably crash. Is this what would really happen? Would the plane be able to glide to a ...
20
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1answer
3k views

Is NASA working on warp drive?

I am cynical about a report on Gizmodo that NASA is developing Warp Drive. This was trending on Google Plus tonight and gathering a bit of attention. ...
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1answer
467 views

What was the Earth rotation when it was formed? [closed]

In an answer to another question, it was claimed that: The magnitude of tidal friction depends on the arrangement of the continents. In the past, the continents were arranged such that tidal ...