yes you can test it under a lamp and see the temp. for the foam and paper and if one has the lowest than that's the better insulator!
good luck!
Foam is a better insulator because of all the air pockets it has.
paper or foam cups
stira foam is a better insulator because it will keep it warm
foam has better heat retention
insulator
Plastic foam is generally a better insulator than wrap because it has a higher R-value, which measures the material's resistance to heat flow. Foam insulation can provide better thermal performance and help reduce energy costs more effectively than wrap.
Construction paper is not a good insulator because it is thin and composed of loosely packed fibers, allowing heat to easily pass through. Insulators need to have a low thermal conductivity to effectively block the flow of heat, which construction paper does not have. Materials like foam, fiberglass, and plastic are better insulators due to their structure and composition.
is foam dirt an metal a good insulator
Open cell spray foam insulation is less dense and allows for more air to pass through, making it a better sound insulator. Closed cell spray foam insulation is denser and provides a higher R-value, making it a better thermal insulator.
No, foam insulation products acts as an insulator.
This depends on the type of foam. There have been made foam that actually conduct electricity. This is a choice made in the manufacturing of the foam. Most foam in mattresses and the like does not conduct electricity. Moisture however can change the mattresses conductivity drastically.
In general, foam is a better insulator than metal, and so foam would be expected to keep water hotter longer under most normal circumstances.