Microwaved Water

Microwaved Water – Last week I received a post via email about the dangers of using a microwave oven to boil water. He says that a student in England conducted an experiment comparing water boiled in a microwave oven with water boiled normally. He used microwaved water in a pot and regular boiled water in another similar plant. She was shocked to see that the microwaved plant wilted daily and died within days, while the other plant grew. Photos of both plants are provided to show how the plants grow day by day.

I decided to test this story by spilling the beans. I bought a packet of seeds and put the seeds in ventilated clear plastic boxes on tissue paper. Then boil one cup of water in a microwave oven and another in an electric kettle. After the water cooled, I soaked one box in microwave water and the other in boiled water. Within an hour the seeds began to swell. Over the next four days, the plants grew equally well in both boxes. Here are the pictures taken on day 4 of my experiment.

Microwaved Water

The box on the right, with the letter M written on the lid, is treated with microwave water. There is no difference between the two sets of plants. Two plants from each box were removed in front of each box to show the tallest and lowest plants in each box. Yes, there were variations on each box.

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The second image shows the seed bag from which the experimental seed was taken, to show that all the seeds come from the same source.

The third image shows all the seedlings taken from each box and sorted by height. The M label indicates that the bottom row is treated with microwave water. The range of variation is the same for both treatments.

In the fourth picture, the seedlings are classified into small, medium and large. The number of seedlings in each size class is indicated on the labels. The box treated with microwave water contained 77 seeds and the other box contained 71 seeds.

Anyone can do this experiment, which illustrates two important principles of scientific experimentation.

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In an experiment comparing two treatments, all other factors must be equal except the experimental treatments. The boxes, the tissue paper, the room and table, the seed source and even the observer should all be the same. Only water is allowed to differ. The experiment was conducted in a room where no one else could come in and disturb them.

The experimental materials, that is, seeds and seedlings, in this case, are naturally variable. There will be slow growers, fast growers, and growers in between. If we use fewer seeds, we may accidentally have small growers in one box and fast growers in the other, and the experiment will not show the effect of water. The number of seeds (we call this the sample size) must be large enough to overcome natural variation. If we don’t know what natural variation to expect, we should start with a large sample. In our case, 70 to 80 seeds turned out to be big enough. If we had started with a very small sample we would not have a clear result.

Most experiments cannot be run that easily. Materials can be expensive and bulky, for example. Coconut instead of squash; Subject to strict moral and ethical restrictions, e.g. Humans and Animals; It can take months or years to develop in unpredictable weather and field conditions, for example. Most field crops; It is impossible to obtain large quantities from a single source. There are ways to deal with all these problems, but the basic principles of testing are the same.

Was the experiment conducted by the English schoolgirl a deliberate fabrication or a poorly planned experiment? I think this is deliberately manufactured.. Can boiled water suddenly explode in a microwave? The fear of superheated microwave water has been around since the early days of the Internet.

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Microwaves for heating water I think the following is information that anyone who uses a microwave oven to heat water should know. About five days ago my 26 year old son decided to have a cup of instant coffee. He took a cup of water and heated it in the microwave (something he had done many times before). I don’t know how long the timer set, but he told me he wanted the water to boil. As the timer went off the oven, she took the bowl out of the oven. He looked into the bowl and noticed that the water was not boiling, but instantly the water in the bowl “blow” into his face. The cup remained intact until he threw it from his hand, but the surge of energy sent all the water flying into his face. He has blisters all over his face and has 1st and 2nd degree burns on his face that can leave scars. There may also be partial loss of vision in the left eye. While in hospital, her GP told her that this was a very common occurrence and that water should never be heated (only) in a microwave oven. If the water is heated in this way, something should be placed in the bowl to dissipate the energy, such as a wooden stick, a tea bag, etc. However, boiling water in a kettle is a much safer option. Send this information to friends and family.

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Exploding water? In short, yes, water can “explode” in the manner described above. However, perfect conditions are required for it to occur, so “explosive water” isn’t just an ordinary hot drink, which would otherwise be cause for dread for anyone who now looks at their microwave with suspicion. Interestingly, you will go through life without witnessing this phenomenon firsthand, and if you are one of the few who do, the experience will not harm you (it will reach your floor. The moment it happens, the liquid will seep. onto the bowl and onto your skin).

This type of phenomenon occurs when water is heated in a clean bowl. If extraneous substances such as instant coffee or sugar are added before heating, the risk is greatly reduced. If overheating has occurred, a slight disturbance or movement, such as picking up the cup or pouring a spoonful of instant coffee, can cause a violent eruption in which boiling water comes out of the cup. What can consumers do to avoid overheated water? Follow the precautions and recommendations found in microwave oven instruction manuals, especially regarding heating times. Do not use excessive time when heating water or liquids in the microwave oven. Determine the best time setting to heat the water to the desired temperature and use that time setting regularly.

The notice sent by e-mail A non-specific example cited above (no names, date or location; only the detail that the “victim” was 26 years old, the usual lack of caution to enforce the idea that the accident could not be blamed about a child), allows us to address only its theoretical aspects. Almost all science writers who have addressed the subject point out that the phenomenon of “severe overheating” is real, but that the message quoted above is not as common as it seems.

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Some of the water in the glass is superheated: the temperature of the liquid is slightly above its actual boiling point, where it would normally turn into a gas. In this case, boiling is hindered by the lack of nucleation sites necessary for bubble formation. . . I imagine that by putting the still bowl in the microwave for a long time, you could blow the entire contents of the bowl into the microwave as soon as you introduce any nucleation sites. The sometimes explosive rate of steam production means you have to be very careful when using a microwave oven.

Glass containers are much more likely to overheat water because their surface is almost perfect. Glasses have the characteristics of frozen liquids, and a glass surface is as smooth as… glass. When you superheat water in a clean glass measuring cup, your chances of overheating it a little are surprisingly high. The spontaneous bubbles that form when sugar, coffee grounds, or tea bags are added to water heated in the microwave are the result of such gentle superheating. Fortunately, serious overheating is rare, as defects, dirt or other impurities usually cause the water to boil before it becomes dangerous. This is why many of us avoid serious injury.

Things are different in the microwave oven. The water heats up, but the container usually doesn’t. No “boiling bubbles”.

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