Questions tagged [water]

A chemical substance with the chemical formula H₂O, and an important biological solvent.

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17
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1answer
3k views

Can magnets be used to clean laundry?

According to the Magnetic Laundry site, magnets can be used instead of detergent to clean laundry! For a "scientific" explanation, their video states: These magnets work at an atomic level to ...
2
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1answer
367 views

Does eating nonsalty food with MSG make you thirsty?

Assume that you're thirsty after eating food that didn't taste salty while you were eating it. I know that MSG contains sodium. Quora posts and https://msgdish.com/msg-problems-and-answers/ still ...
8
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1answer
16k 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). ...
3
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1answer
453 views

Does salt (or sodium) not make you thirsty?

This is from a Toronto MS thesis: High dietary sodium intake is hypothesized to increase food intake (FI), fluid intake and glycemic response. Two short-term randomized repeated-measures studies ...
14
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0answers
14k views

Is rice water a good fertilizer?

When rice is washed, the wash water becomes whitish due to the starchy powder in the skin of unwashed rice. I've often heard or read, usually in water-saving, money-saving, or gardening tips, that the ...
23
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2answers
3k views

Do fruit/vegetable washes effectively remove pesticides?

Is there any evidence to suggest that commercially available fruit/vegetable washes can effectively remove pesticides from produce? Here are some example claims: Veggie Wash uses natural cleaners ...
8
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2answers
840 views

In the U.S., is more water used for electric generation, and more electricity used for water infrastucture, than anything else?

Today I received an e-mail message regarding an upcoming Energy Water Nexus Technical Conference that made this unsupported claim: Nationally, the largest category for water consumption is electric ...
11
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2answers
1k views

Does a vortex vessel affect water in these specific ways?

I just saw a Kickstarter campaign for a "vortex vessel" that supposedly improves tap water for drinking. Some of the claims: "[Tap water is] stuck in closed pipes where no beneficiary chemical ...
7
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2answers
1k views

Can you extract over 500 gallons of water from the air a day for a few cents per bottle?

According to the Daily Mail article LA couple win $1.5 million XPrize for radical system that can make clean water from AIR for less than 2 cents a quart, David Hertz and Laura Doss-Hertz have ...
1
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1answer
481 views

Does boiling water with solid silver kill germs?

I was in China recently, and the tour guide mentioned that in some parts of China, the water quality is not good (due to pollution). To get around this problem, some locals used solid silver and ...
24
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2answers
13k views

Can boiling water break car windows?

A friend of mine in Australia has heard from several of her friends that it's unsafe to pour boiling water on car windows in order to defrost them. Online examples of people claiming it's unsafe ...
28
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1answer
4k views

In California, is water from the north diverted into the Pacific Ocean?

Possibly addressing the Californian wildfires, president Donald Trump claims that in California "water coming from the north" is "being diverted into the Pacific Ocean". Governor Jerry Brown must ...
10
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0answers
527 views

Do cats avoid water when it is placed near food?

This tumblr post makes the interesting claim that if a cat's water is placed near its food, the cat will consider the water to be unsafe to drink, and that cats will be more inclined to drink it if it ...
23
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2answers
2k views

Is bottled water more contaminated than tap water?

According to some NPO's such as the Australian Centre for Independent Journalism and the Environmental Working Group: Bottled water is constantly promoted as pure and natural, but research by the ...
16
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1answer
835 views

Is urine the cause of redness of eyes (in swimming pools)?

According to abc13.com, Chlorine in swimming pools don't make your eyes red, it's the urine. Quoting from the article: One of the most shocking revelations the CDC shared was the truth behind what ...
18
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1answer
33k views

Will fluoride and chlorine dissipate from tap water left to sit overnight?

One common recommendation for watering house plants with tap water is to allow the water to sit overnight before watering, so that the fluorine and chlorine that are commonly added to tap water (which ...
15
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1answer
10k views

Is chlorine in water absorbed quickly through the skin?

I recently saw a demonstration of a water filtration and purification system. In one of the demos two glasses were filled with tap water and then someone put three fingers into one of the glasses and ...
8
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2answers
16k views

Does Pureit Polisher remove the chlorine from chlorinated water?

This purifier claims to produce 100% pure water. They use chlorine. Chlorine, when taken in for a long period, is bad for health. The 4 stage purification process. Polisher Removes chlorine and ...
2
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1answer
381 views

Does chlorine in water harm humans? [closed]

Some sources claim chlorinated tap water is harmful. Global Healing Center, for example, claims links to cancer, heart disease, asthma and atherosclerosis. The risk of developing cancer is 93% ...
2
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0answers
1k views

Does chlorine in water harm soil bacteria?

This article claims that both chlorine, and chloramine, which are added to many municipal water supplies to kill harmful bacteria, can also harm the good bacteria in soil, necessary for a healthy ...
55
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1answer
50k views

Do laws exist that say restaurants must serve customers who request tap water?

My mother claimed the other day that it is a "state law" that any restaurant must serve customers tap water upon request, therefore not requiring customers to buy a (flavored) drink or (overpriced) ...
3
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1answer
527 views

Does atmospheric water contain minerals?

Scalene Aquaria sell a machine that collects from moisture from the air. They describe a nine-stage process - most of it looks like hogwash, but this one made me more curious: The Eighth stage ...
222
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4answers
27k views

Does hot water freeze faster than cold water?

Is it true that hot water freezes faster than cold water and if so, what practical applications have there been found for this phenomenon?
4
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0answers
276 views

Did the Vanderbilts from the Gilded Age bathe in saltwater?

Recently, I visited the mansion that the Vanderbilt family (from the Gilded Age, late 1800s) used to live in -- it's commonly referred to as "The Breakers", located in Newport, Rhode Island. Many of ...
59
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1answer
12k views

Does anybody spend 6 hours each day just to get water?

During the 2018 Super Bowl there was a commercial advertising a campaign to help bring fresh water to people in developing countries. It argued that fresh water is grossly easy to attain in developed ...
16
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1answer
2k views

Does it take 200L of water to make a latte?

I just saw this Youtube clip that claims it takes 200L of water to make a latte. Is that true?
38
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3answers
4k views

Is water fluoridation harmful?

There’s a controversy going around whether the benefits of water fluoridation outweigh the potential harms. What is the evidence for the harm this may cause and what evidence supports the health ...
6
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0answers
537 views

Does watering plants with purified water yield better results?

I watched a commercial for the Aquaguard Enhance RO+UV water purifier recently. In that commercial, a science teacher assigns an experiment to students. The students bringing a plant to school, and ...
6
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1answer
1k views

Does hydrogen-infused water have these health benefits?

I recently saw a local shop selling packages of water infused with hydrogen gas. It was alleged that hydrogen is an antioxidant and therefore drinking hydrogen-infused water would have various health ...
38
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2answers
9k views

Does drinking distilled water remove needed minerals from your body?

Claim: Drinking distilled water can actually remove needed minerals from the body, due the lack of minerals in the water, and therefore do damage to the body. I have a hard time accepting this due ...
81
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2answers
12k views

Is drinking water during a meal bad for you?

I have heard that it will "wash away the nutrients", that it dilutes stomach acid and all kinds of things. Is this just an old-wives tale?
21
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2answers
12k views

Is water calcification bad for your health?

I have a friend, who adamantly believes that water calcification causes a number of problems, including poor health. He also said it made the water taste disgusting. He had recently installed a ...
4
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1answer
903 views

Can someone survive being swallowed by a whale?

This site claims that a man was swallowed by a whale for three days and survived. His name is Luihi Marquez and is Spanish. Upon searching, it seems that multiple news sites have covered this ...
3
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0answers
205 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 ...
40
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2answers
56k views

Is there a place in the world where two oceans meet and they don't mix?

This picture is currently being spread virally: Some Muslims were saying that this is mentioned in the Quran where it is said: He has set free the two seas meeting together. There is a barrier ...
24
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2answers
12k views

Has 99% of the western continental Europe banned water fluoridation?

I keep seeing this claim about the unpopularity of water fluoridation parroted. Despite dental pressure, 99% of western continental Europe has rejected, banned, or stopped fluoridation due to ...
5
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3answers
692 views

Is drinking collected rain water proven to be beneficial for your health?

Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then precipitated—that is, become heavy enough to fall under gravity. After reading the article ...
10
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1answer
11k 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 ...
15
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1answer
4k views

Does it take 20000 L of water to produce 1 kg of cotton and 130 L to produce 1 cup of coffee?

http://everylastdrop.co.uk/ says "When you consider the water required to produce all the stuff we consume, we actually guzzle a massive 4,645 litres every day". It then lists several specific cases, ...
11
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1answer
15k views

Does cold water boil faster than hot water?

I was having a chat about science with a manager in my office. We were talking about water and he said "you shouldn't boil water from the hot tap because cold water boils faster". I know about the ...
33
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3answers
26k views

Do knives get dull in dishwashers?

Everybody keeps telling me don't put knives in dishwashers. And if I ask them why, nobody seems to have an answer or an argument to support his/her advice. So I thought I'll shoot the question to ...
15
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2answers
19k views

Is it better to water lawn in the morning or in the evening?

Some gardening sources recommend watering lawn in the morning, with the reason being water is needed for photosynthesis, and the grass can use it straight away after watering. Some sources say the ...
20
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0answers
27k views

Does adding a dry towel to a load in the dryer make it dry faster?

Is there any truth to the claim the a dry towel can actually speed up the drying process? There are numerous different sources that I've heard claim this, here is one on voices.yahoo A few months ...
20
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1answer
6k views

Does one hamburger take more water to produce than 2 months worth of showering?

One hamburger requires 660 gallons of water to produce – the equivalent of 2 months’ worth of showers. Per http://www.cowspiracy.com/facts/ from Catanese, Christina. “Virtual Water, Real Impacts.” ...
3
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1answer
683 views

Can current flooding in California end the years-long drought?

California has been stricken by severe drought for years now, to the point that the governor has been required to mandate water rationing. In an Accuweather piece about the storm currently ravaging ...
28
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2answers
2k views

Does dowsing (aka Water Divining) work?

Also known as water divining, the more general term is dowsing. Practitioners claim to be able to detect minerals and even specific objects. I first became interested in dowsing in my teens, when the ...
1
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1answer
332 views

Can we find water with wood sticks? [duplicate]

Many people and websites claim that one can find water with wood sticks (typically Hazel stick shaped in 'Y'). those who seek for water with wood sticks are called "sourcier" in french. As I fail to ...
21
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1answer
4k views

Does Masaru Emoto's experiment show human consciousness affects the aesthetics of water crystals?

Japanese author and doctor of alternative medicine, Masaru Emoto claims that water can react to intentions. Talk nice to water and you get nice looking ice crystals from it. Mention Adolf Hitler near ...
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0answers
95 views

Thoughts affect water? [duplicate]

I happened to come across the experiment conducted by Masuru Emoto in which he claims that thoughts affect water. He claims to have taken pictures under a microscope before and after applying mental ...
1
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0answers
105 views

Has this 2006 experiment about the effect of distant intention on water been challenged? [duplicate]

While researching Masaru Emoto (who I hadn't heard of before today), I found plenty of places where his work was rejected as being only pseudo-scientific, yet I also found this one paper: Double-Blind ...