I need to keep an ice cube frozen. Since metal is a heat dissipator, and salt lowers the melting temperature..
439741
there is a couple ways to do it. the first one is to insert the ice in a ice-chest and add salt around the ice the other option is to buy dry ice try to cover the regular ice with a plastic or with something to keep the regular ice separate from the dry ice and the dry ice around the plastic this would help to keep the ice cube frozen
684939
possibly salt water,  salt water has a lower freezing point than water, it could keep the metal warmer than the ice cream so the ice cream would slightly melt as the scoop passed through the ice cream making it easier to scoop.  possibly
578593
usually a bag of ice cubes should work and should not turn warm, though it may turn somewhat watery. but when that happens, just switch to another bag. That's what i do all the time and obviously don't do it a place where it can get hot. haha
874149
Yes.  Adding salt to frozen water lowers the melting point.  \n\nConsider that snow and ice are really the same thing, in different mass quantities - water in solid state due to ambient temperature.\n\nBest to you.
676532
This is known as a colligative property of most solvents, namely freezing point depression and boiling point elevation.  For freezing water, the molecules need to align themselves in a very organized lattice.  When other substances (salt for example) are present, they interfere with the ability of water molecules to align themselves properly.  This is how salt is used to keep water from freezing in the winter.  It doesn't melt it, it lowers its freezing point.
1052359
Easy, every substance has a melting/freezing point. Just because substances are in a liquid state at... room temperature (25 celcius), doesnt mean that one wont freeze at 20 Celcius and another at... -15 Celcius make sense right? \n\nWell when you disolve things into a liquid (which are at that point called electrolites I believe, the things you disolve into the liquid that is) you change the freezing point of that liquid. \n\nFor example water, plain freshwater freezes at 32 Ferinheight, but you add 3% salt to it and you have saltwater right. And the freezing point of saltwater which only has a very little bit of salt in it now freezes at around 0 Ferinheight.\n\nSo iced tea has a bunch of crap added to it so it could very easy change the temperature that that specific liquid freezes. \n\nAnother very important note is that if it is in the back of the fridge, then that is where it could easily be below 30 degrees and it could freeze up. It is way colder in the back of the fridge then in the front.
172797
there is ice when it is cold, this is known as being frozen
570058
the outside of the cubes melt the fastest while the inside are still froze.  What happens is the inside refreezes the melting outside therefor sticking together.  This will even happen while in ther freezer (if it is a self-defrosting kind)
199280
Salt causes the freezing point of water (and any other solvent for that matter) to be lowered. Thus, a salt solution freezes at a lower temperature than pure water. This phenomenon is called "freezing point depression." The extent to which the temperature is lowered is a function of the molality (moles of solute per kilogram of solution). That means that the more salt you add, the lower will be the freezing point.
684151
The freezing point of pure water is 0°C, but that melting point can be lowered by the adding any solvent such as a salt. Depending on the amount of salt the freezing temperature of a saline solution can range from below 0°C to -21.1°C. The frozen solution is a mixture of separate NaCl·2H2O crystals and ice crystals, not a homogeneous mixture of salt and water. This heterogeneous mixture is called a eutectic mixture. \nThe use of ordinary salt on sidewalks is effective because it requires a colder temperature to freeze water and it is a cheaper alternative to other solvents or methods of ice removal.
132761
Use dry ice. It is always -78 or colder.
272000
ice pack.  a good ice pack to use is frozen peas or corn cuz they can form easily to the area instead of being "small blocks"
308984
I've actually tried this.  I put ice in a plastic bag and I also put some in a aliminum foil ball.  I came back 5 hours later and the ice in the plastic bag was melted but the foil ice was intact and partially whole.
55409
You can use sand but this does nothing to melt the ice. It merely makes it easier to get a little traction so you can drive over it. \n\nRecently, some areas use a liquid chemical de-icing solution (Calcium Magnesium acetate is one such solution) that gets sprayed directly to roads.  It is more expensive than salt.
12825
If you rub the ice with the fleece then friction introduces heat to the ice and may melt some.  \n\nIf you wrap ice in fleece on a warm day then the insulating properties of fleece will reduce the rate at which it melts.
75493
Salt lowers the freezing point of water, making the salt/ice combination colder than ice alone.  This makes the ice cream freezing process faster.
325784
The first question has been asked and answered so many times, it should be permanently barred. Go learn some elementary physics.\n\nAs for the second question, it depends on how you take the cubes out. If you twist the tray, which a lot of people do, you will crack the crystalline structure of the ice, because somne of the ice adheres to the tray walls. If you run warm water over the borrom of the tray, they will all come out whole - but not as cold, because the water will have added calories to their edges of the cubes, melting them a little.