Questions tagged [physics]

Use this tag for questions about the physical nature of reality and in particular claims that are strictly about the field of physics. Please use specific tags if the question is about other sciences such as chemistry. Also consider to add [electromagnetism] and [radiation] if appropriate.

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351 views

Does UV light harm books?

This Life Hacks answer recommends UV-C lamp to disinfect books from SARS-COV-2. But UV light is one of the main destroyers of books. While UV light can kill viruses, it is not guaranteed. – ...
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Did George Biddell Airy write a paper “On Certain conditions under which a Perpetual Motion is possible”?

George Biddell Airy was an English mathematician. He was Astronomer Royal from 1835 to 1881 According to the Bessler Wheel web-site (a site dedicated to investigationg perpetual motion machines, Airy ...
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1answer
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Did chemist Glenn Seaborg claim the Oklo reactor was man-made?

The Oklo mine in Gabon is thought to be the site of the only natural nuclear fission reactors. An Instagram video posted by Instagram user matrixdisclosure claims it was actually man-made. Nobel ...
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389 views

Have Divine Particles spontaneously appeared in an Indian Ashram?

The Spiritual Research Foundation have some reports of a phenomenon that they have investigated: Ms. Kalyani Gangan, who was there, recollects: “On 5th July 2012 at 7.30 pm, I entered H.H. Dr. ...
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2answers
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Do 4K displays use more power, because it is hard for the backlight to shine through those super tiny pixels?

I was watching Linus reviewing the 2020 MacBook Air and he said about the competing laptops that 4K was pointless on a 13" laptop and that it just hurts the battery life, because it's harder for the ...
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1answer
483 views

Is it possible for time on Earth to randomly stop?

On the Glitch in the Matrix subreddit, there are many examples of time stopping. Here is an example: Something felt really weird, my parents were like frozen up (not moving completely) my dad had ...
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Is ceramic window-tinting film the type of window-tinting film that is able to block the most percentage of UV radiations from entering a car?

I read on http://thespokaneshop.com/spokane-window-tinting/different-types-window-tint-film (mirror): Ceramic film is also most effective in its blocking of ultraviolet light from the interior; in ...
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1answer
275 views

Can using black glue coating on an umbrella block 99.99% of UV-A and UV-B radiations?

I read on https://smile.amazon.com/gp/product/B07XP321LY/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 (mirror): Black glue umbrella is the newer version sun umbrella instead of silver glue ...
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Do photons have friction?

In the book 1998 biography, A Beautiful Mind, by Sylvia Nasar, John Nash is said to have entered Einstein's office to discuss his ideas that photons have friction. Nash had an idea about "gravity, ...
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492 views

Can electricity be obtained from neutrino radiation, like a solar cell?

Power Technology magazine published a 2019 article *Neutrino energy: harnessing the power of cosmic radiation. It describes a new energy technology - making solar panels, but for neutrinos instead of ...
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1answer
918 views

Does aluminum foil safeguard your credit card from RFID attacks?

Evidence against Does Aluminum Foil Stop Identity Theft? Some sources say that if you actually have an RFID-enabled credit card, aluminum foil does the same job, if not better, than an expensive RFID-...
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1answer
550 views

Is the water used in coal burning power plants “never returned to the environment”?

According to a Duke University press release titled Replacing Coal with Gas or Renewables Saves Billions of Gallons of Water: Water consumption – the amount of water used by a power plant and ...
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Does wetting a beer glass change the foam characteristics?

Many bars rinse a beer glass immediately before serving. I've consulted with bartenders and Google, and there's some confusion about it. Some sites claim it reduces foaming. Another perk is that ...
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2answers
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Did the British navy fail to take into account the ballistics correction due to Coriolis force during WW1 Falkland Islands battle?

In Natural History magazine article, Neil DeGrasse Tyson claims the following: The military normally knows all about the Coriolis force and thus introduces the appropriate correction to all missile ...
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In a lightning storm, is it safer to stand near a beech tree than near an oak tree?

According to a German folk wisdom, in a lightning storm one should avoid oaks and seek out beeches. German Wikipedia on Volksweisheit: „Buchen sollst Du suchen, Eichen sollst Du weichen“ Meaning ...
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1answer
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Is Feynman's claim about the history of measurements of the charge of the electron after Millikan accurate?

In a 1974 speech Richard Feynman famously described an example of confirmation bias in science: One example: Millikan measured the charge on an electron by an experiment with falling oil drops, and ...
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622 views

Is the Infinity MG10 a working generator that consumes no fuel?

Infinity Sav are a company pushing a product, the MG10 which is available for pre-order which, they claim, can generate electricity without consuming fuel - i.e. is a free energy machine. The ...
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4answers
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Do wooden building fires get hotter than 600°C?

After the recent Notre-Dame de Paris fire, there has been a heavily re-posted tweet going around in response to an earlier claim that a golden cross did not melt or deform - due to an act of God. ...
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1answer
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Can light travel at 30x the speed of light? [closed]

The claim seems to be that the researchers can make light travel faster than the speed of light. Is this true? How does it even make sense? It’s in Nature so presumably there’s something in it, but ...
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2answers
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Has the laser at Magurele, Romania reached a tenth of the Sun's power?

This month the laser at Magurele, Romania became the most powerful laser in the world, according to various sources. Related: Is the laser built in Măgurele, România, the most powerful in the ...
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0answers
811 views

Does cutting paper dull a knife quickly? [duplicate]

This question is a follow-up to "How to test the sharpness of a knife?", my answer to it, and the comments my answer generated. Charlie Brumbaugh wanted to know how to tell when he is done when ...
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1answer
920 views

Does Heads Up Texas Hold'em have more possible hands than atoms in the universe?

In the Vice (HBO) clip AI Poker Bots Are Beating The World's Best Players, it is claimed (at 2:00), that Texas Hold'em has "more possible hands than atoms in the universe". ..this competition ...
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0answers
599 views

Can ridges on the bottom of shakers be used to help with dispensing?

From https://twitter.com/LipBitinANNAmal/status/1078840770864529408 156,700 Retweets 376,681 Likes (probably not the original author): How old were y’all when you found out the ridges on the bottom ...
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1answer
570 views

Do lipid droplets in our skin create a laser?

The home page of Dr Jack Kruse, who claims to be a neurosurgeon and "optimal health educator" contains the following paragraph: There is a deep connection between thermodynamics in biology and the ...
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1answer
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Does turning the lamp in my classroom off and on use more energy than it being turned on for 30 minutes?

My physics teacher regularly said to our class: Turning these lights [pointing to the ceiling of the classroom] off and on uses more energy than leaving them on for 30 minutes. Is this true? I ...
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1answer
560 views

Does General Relativity bring “Cosmic Time,” which is the same for all frames-of-reference?

In a recent podcast, the philosopher William Lane Craig said that while Special Relativity taught us to doubt whether any given clock is, or whether it could be, an absolute measure of time, General ...
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Is redefining the kilogram useful for drug development and nanotechnology?

With the redefinition of kilogram currently underway, I see recent online articles claiming that a precise definition of the kilogram is critical for drug development and nanotechnology. E.g. BBC.com ...
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1answer
331 views

Does the Wowfixit screen protector harden phone screens?

The WOWFIXIT web-page offers a product where you wipe a liquid over your phone screen and polish it. They claim the result will make your protect your phone screen from scratches: One of the many ...
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1answer
10k views

Antistatic bracelet without a ground connection

Last winter in Japan, some of my friends were buying bracelets like this, that claim to prevent or reduce static shocks: Here is an advertisement picture describing how it is supposed to be used, ...
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3answers
2k views

Is the F-35 aircraft literally invisible? [closed]

Donald Trump said of the F-35 "You can’t see it. You literally can’t see it. It’s hard to fight a plane you can’t see" The video of him saying this makes it seem as if he really believes it can't be ...
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0answers
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Does this video show a sonic boom through a sun dog?

This YouTube video purports to be of a rocket launch from the Kennedy Space Center in 2010. It shows a rocket reaching the speed of sound, and creating a sonic boom at the same time as the rocket ...
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679 views

Does carrying or consuming onions help to prevent heatstroke and/or reduce your body temperature?

Will consuming onions help to reduce your body temperature, or prevent heatstroke? Some common variations of this claim include applying onion juice to your skin, or even just carrying an onion in ...
72
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1answer
12k views

Are the claims made by Indian Ministers / personalities regarding ancient Indian inventions true?

In the past couple of years, several Indian Ministers / personalities have made claims regarding existence of modern inventions in Ancient India. Prime Minister Modi claimed that genetic science ...
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2answers
3k views

Has the speed of light significantly slowed down over the past 6,000 years?

One of the problems for young-Earth creationism is that we are seeing light from stars more than 6,000 light-years away, which implies that those stars pre-date the alleged date of the creation. To ...
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1answer
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Is the laser built in Măgurele, România, the most powerful in the world?

Some news websites, including Romanian and non-Romanian ones, claim that the laser built in Măgurele, România (which is going to be used starting today), is the most powerful (and in other sources the ...
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4answers
4k views

Did all iron on Earth come from outer space?

According to the video 9 Shocking Facts from the Quran! Iron is not natural to the Earth. It did not form on the Earth but came down to Earth from outer space. This may sound strange but it is true....
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1answer
563 views

What evidence would remain of the use of atomic/nuclear weapons 26,000 years ago? [closed]

In his 1998 book, Yellow Sky: an alternative perspective about the human condition and history, Kenneth Lipton argues that high radon levels in southeastern Pennsylvania may provide evidence of prior ...
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1answer
484 views

Is there compelling proof against an alternative to the law of conservation of energy? [closed]

The law of conservation of energy states that energy cannot be created or destroyed, but changed into different forms, which I've never found entirely compelling. It's impossible to measure the energy ...
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2answers
774 views

Did thirteenth century scholars attempt to determine the congealing of oil by reading Aristotle?

In "The Production of Knowledge" William Starbuck presents the following anecdote (without providing its source). Is this anecdote based on a real historically traceable incidence? During the ...
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1answer
614 views

Does each doubling of CO2 cause a 2-4°C increase?

Professor Henrik Svensmark argues that cosmic rays have a strong influence on cloud formation and hence climate change. In 2016 he predicted global warming was over. He was recently the lead author of ...
15
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1answer
877 views

Can gamma rays on an airplane damage a digital camera?

Rob Hummer gave a talk at Cine Gear Expo 2011 about how film and digital cameras catch light. He makes a handful of extraordinary claims about digital sensors - including a claim that you get dead ...
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1answer
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“The Flat Earth Society has members all around the globe”?

When one googles "The Flat Earth Society has members all around the globe", many images appear. Some of them claim this is a post by the Flat Earth Society itself, such as this one: I wonder if this ...
54
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3answers
13k views

Does plutonium exist in the world, apart from being manufactured?

In reference to the Manhattan Project at Los Alamos, a mathematician, Peter Lax, described his time working there as "living science fiction". He said: we were told essentially the basic thing: ...
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1answer
1k views

Does grabbing a fidget spinner in zero G cause your body to tumble rapidly?

Techly have posted a video they attribute to NASA. It shows ISS astronauts looking at a fidget spinner floating in space and grabbing it. After a jump-cut, they are shown tumbling (rotating along all ...
3
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1answer
640 views

Electro-osmotic pump to keep bunker dry

Supposedly the latest tech in keeping water out of (historically significant) bunkers is electro-osmotic pulse technology. EOP is based on the principle of electro-osmosis—the movement of a liquid ...
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0answers
242 views

Is there any scientific basis to this “catalytic converter” to treat hard water?

I came across this product called Softer Water Conditioners. It includes a lot of scientific sounding mumbo-jumbo to explain how it works, which raises my skepticism. Is there any scientific basis to ...
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1answer
691 views

Did an apple falling on Newton's head help him build his theory of gravity?

The popular belief goes like this: Isaac Newton was sitting in his garden under a tree when an apple falls on his head, and suddenly he came up with his theory of gravity. Did this event really ...
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0answers
490 views

Speed of light not constant as measured by many scientific / research groups, but averaged & politically standardized? [closed]

In banned/ removed TEDxTalk, The Science Delusion - Rupert Sheldrake at TEDx Whitechapel, the speaker has talked about various things but I am focused on the "constants" such as "light" that he has ...
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1answer
8k views

Did a lightning strike make a river roll and boil?

There's a video that I just came across on Facebook: original source: http://www.youtube.com/watch?v=TD2hyCUePL0 alternative copy: https://www.facebook.com/hardbond/videos/10155610316509339/ In the ...
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1answer
996 views

Did Israel install cameras that can see through clothing on the Temple Mount?

In this article Salah Abu Agrafa, a worshipper at the Temple Mount claims: “They took away the metal detectors, but they replaced them with X-ray cameras that can look at our women naked.” ...

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