Questions tagged [water]

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

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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 ...
5
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1answer
2k views

Does drinking water (or Sports Drink) improve performance during sports activities?

I have been looking for some concrete study about the performance changes during sports when drinking water or a sports drink while doing the sport. Not after, not before. While, or during, if you ...
36
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1answer
12k views

Is it beneficial to drink alkaline water (aka Kangen water)?

At a friend's house the other day, some sort of contraption had appeared near the sink since the last time I had been there. It was a filtration-looking device with one input hose connected to the tap ...
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 ...
20
votes
1answer
19k views

Do hot baths damage skin or nerves?

I like to take showers and baths hot enough to leave my skin pink when I come out. One of my friends has a much lower tolerance to hot water and has said that that soaking in hot water can damage the ...
7
votes
1answer
23k views

Do the water filters in Bobble water bottles work?

A retailer claims that Bobble water bottles: Filter your own bottled water with this unique and patented set of two Bobble Water Bottles. An active carbon filter eliminates toxins and harmful ...
37
votes
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 ...
1
vote
0answers
342 views

Does drinking sparkling water lead to Osteoporosis? [duplicate]

Possible Duplicate: Does pop/soda pop cause Osteoporosis? According to several studies, drinking carbonated drinks elads to this. Osteoporosis According to "Nelson Textbook of Pediatrics," ...
33
votes
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 ...
20
votes
2answers
15k views

Is drinking hot water more beneficial during hot weather?

I heard from various sources since I was growing up that during hot weather one should drink warm or hot drinks and during cold weather one should rather drink cold drinks, but a quick google found no ...
34
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2answers
40k views

Do magnetic water softeners work?

I'm extremely skeptical of the idea of magnetic water softeners (strong magnets attached to pipes), but desperately wish it were true because I hate lugging 40# bags of salt out to my well house in ...
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 ...
16
votes
2answers
12k views

Does Indian Water Therapy have healing effects?

Indian Water Therapy is an ancient practice which involves drinking 1-1.5 litres of water every day as soon as you wake up, then not eating anything until 40 minutes has passed, at which point you can ...
13
votes
1answer
3k views

Does Baywatch-style CPR work?

It's a common movie scene. Someone falls in a large body of water and drowns, losing consciousness. Our hero rescues the victim, gives 10 seconds of CPR, emits various imprecations to the tone of "...
25
votes
1answer
14k views

If you put your hand in water while sleeping/drunk, will you pee yourself?

This is like an urban myth and a classic prank, but I never saw it in action. Supposedly if someone is passed out or sleeping, the contact with water will make him pee. Is this true? If true, why ...
225
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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?
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 ...
44
votes
3answers
25k views

Is watering plants under a hot sun bad?

A couple of people have told me that it's a bad for plants to be watered in the middle of a sunny day, i.e. it's not just that you waste more water due to evaporation, but that there are actually bad ...
40
votes
1answer
4k views

Is refilling water bottles bad for you?

On a lot of bottles of so called mineral water, it is advised not to refill the bottle (with ordinary tap water, or any other drink e.g. cola) as doing so may present a health hazard. Is there any ...
25
votes
1answer
2k views

Can anything be 'more hydrating than water'?

Some sports drinks, and even vegetables claim to be 'more hydrating than water'. What does this even mean? How is 'hydration' even measured? If I ate enough cucumbers could I survive without ever ...
19
votes
2answers
1k views

Does hydraulic fracking endanger the drinking water supply?

According to an industry website the process of Hydraulic Fracturing (or "fracking") is safe. According to an article in the Huffington Post the process is not safe. At least, there is evidence the ...
10
votes
2answers
813 views

Are there no two snow crystals alike?

I remember vividly that when i still was young, I'd examine the snow as it dropped on my winter cloths. Every time I was amazed by the nice textures I discovered. Now many years later, I'm wondering ...
49
votes
2answers
4k views

Do people need to drink 8 glasses of water a day?

Since I was a kid, I can't remember how many times I've heard that a healthy person needs to drink at least 8 glasses of water a day. There are definitely plenty of reasons to remain well-hydrated. ...
13
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4answers
14k views

Is there hard science behind the benefits of home water softeners? [closed]

Does anyone know of any empirical studies or well-tested scientific theories on the benefits (or lack thereof) of using a home water softener? I have a water softener in my house that we installed ...
13
votes
2answers
12k views

Does bathing using a shower use more water than using a bucket or bath-tub?

I have heard many times during "Save water" campaigns that bathing using a shower uses more water than using a bucket or bath-tub? Is this true?
80
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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?
19
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2answers
12k views

Does drinking warm or hot water aid in digestion?

One of my brother-in-law's coworkers claims that drinking hot water (straight from the tap) aids in digestion. I've been able to find a debunking of cold water causing cancer, but can't find anything ...
28
votes
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 ...
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?
53
votes
4answers
12k views

Does water swirl the opposite way on the other hemisphere?

I have heard this one several times but was never given a convincing explanation. Is this a real phenomenon? (Bonus points for a good physical description of the behavior or reasons it couldn't occur....
41
votes
3answers
3k views

Can microwaved water explode?

Some time ago I read a warning that microwaved water can "explode" under certain circumstances. There was one case as an example where someone heated water in the microwave, took it out and then it "...
16
votes
3answers
3k views

Can an electronic device reduce scale buildup in waterworks?

I have recently received an ad for a device attaching to my inlet water pipe and a power socket, and claiming to massively reduce the scale build-up. This compact, computerised limescale remover ...