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The sort of dishcloths generically known as J Cloths are made from a material called Viscose rayon: This material is derived from cellulose and like cellulose it interacts with water. Water breaks hydrogen bonds formed within the fibres. This makes the fibres softer, and the exposed hydroxyl groups make the surface more hydrophilic. It's the latter ...


8

Steam is caused when water vapor condenses. This is caused by the air having too much water vapor for it to hold. When you have a lot of heat under the pan, the air above the pan is quite hot and can hold a lot of water. The water evaporating from the pan disperses into the atmosphere and doesn't condense. When you turn off the heat, the pan and food ...


3

The branch of physics that studies these problems is called "thermodynamics", and it is a very successful theory as it describes most bulk matter behavior and can be used in engineering and other projects reliably. In thermodynamics matter is composed of molecules modeled as classical particles with some collective properties that are defined by ...


2

I suspect it's a surface tension question. When a dish cloth is slightly damp, then water is already between the fibers. Putting a drop of water in touch with that fiber (and water), the water will be drawn from the drop into the space between the fibers. By contrast, if the cloth is really dry, then when the drop is touching the fiber, it first needs to ...


2

It's because normal ice, ice Ih, is less dense than liquid water. Ice Ih forms hexagonal crystals. The bonds in that crystalline structure make the water molecules slightly further apart than they are in the liquid form at the same pressure. That water expands on freezing makes water resist freezing as pressure increases. This in turn makes the fusion point ...


1

Heavy Water is toxic to most organisms. Usually, an organism will die before half of their body's water has been replaced by heavy water (which would require ingestion of very large amounts of heavy water and limited ingestion of regular water). It's toxic because it inhibits cell division and slows down the rate of life processes. It would slow your ...


1

Well, in the pot with less water you'll have more salt spread through a smaller volume than the other pot. That means the water will be saltier in the pot with less water. I don't know the salt transfer rate for a solution to dumplings, but I would assume the one with a higher salt-to-water ratio would be saltier.


1

For the answer I will make two assumptions: in both pots the amount of water is enough 1) to get all the salt into solution and 2) to not get absorbed completely by the dumplings. Say pot A has less water than pot B than the concentration of salt in pot A will be higher. If the dumplings are initially dry, they will absorb water and the dumplings in pot A ...


1

Due to evaporation a layer of air forms between the water droplet and the hot surface which causes the system to vibrate by letting air escape in bursts and produce sound. I suggest reading about the description of the sound that was recorded in the Leidenfrost experiment. Article: http://www.nature.com/srep/2012/121010/srep00720/full/srep00720.html Video: ...


1

Ions can indeed carry current (ex. electrolysis). "An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.[1]"


1

Well, technically yes (assuming you mean ionized and not just "charged"). Current (in simple terms) is only the time rate of charge flow, which is not exclusively limited to electrons or any specific charge carrier. Electrolytic conductivity is well documented, naturally being higher for strong electrolytes as compared to the ones that dissociate weakly in ...


1

Yes, electric current is movement of any kind of charges. The problem with your particular example is that most liquids containing ions are also conductive. Electrons will hop between molecules and equalize the ionic charges, then end up providing most of the conduction themselves. There are cases where actual ion migration results in much of the current, ...


1

ice is less denser than water because in ice the molecules arrange themselves in a rigid tetrahedral structure due to which cage like spaces remain in their bonding. But water molecules remain in linear bonding form. As the volume of ice becomes greater, it is less denser.


1

If all you did was drink distilled water, it would not be terribly healthy for you. But most people eat as well - and that combination probably includes "healthy" minerals. Unless you binge-drink distilled water without any food, it's unlikely to cause serious health effects. Having said that - ions are pretty small - certainly smaller than 15 nm. But their ...



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