a poor thermal conductor
a poor thermal conductor
you did not show me any thing
Trapped air makes a good insulator.
To stop ice from melting you are going to have to stop heat getting to it so you need to wrap it in a good insulator. Wrapping the ice in bubble wrap or putting it in a box made from polystyrene foam would work well, the thicker the insulator the better! A waterproof insulator is good because water is quite a good conductor of heat, if you say wrapped it in straw then the water released from the first bit of ice would soak into the straw and make it a less good insulator allowing more ice to melt. You could get around this by putting the ice in a plastic bag and wrapping the bag in an insulator that wasn't waterproof. For any container the more ice you have in it at the start the longer some will last. Ice can be kept in a high quality vacuum flask for quite a long time but if you are looking to make it yourself then it would be far from simple.
Pure water is an insulator, but in the "real world", water usually has impurities - notably ions - that actually make it a good conductor. This is theory; I don't think it is practical to use water as an insulator.
a poor thermal conductor.
a poor thermal conductor
A nonmetal would make a good insulator.
a poor thermal conductor.
rubber
you did not show me any thing
Trapped air makes a good insulator.
Insulator.
your mom and your dad in bed
It is an insulator. It would take many wraps to make it become a good insulator. There are much better products in the market place to use for insulation purposes which are much safer.
An electrical insulator is a material whose internal electric charges do not flow freely. Rubber, glass, paper, and Teflon, which have high resistivity, are very good electrical insulators.
the insulator s metal must has fully filled orbital without any free electron