Cold metal.
Cold water
TEMPERATURE Cold air is denser
Hot water is less denser than cold water and has a greater temperature.
Hot water is less denser than cold water and has a greater temperature.
No, hot air is less dense than cold air.
It is "Convection".
Air can vary in temperature, so it can be cold or hot depending on the environment. Cold air is denser and can feel refreshing, while hot air is lighter and can feel warmer on the skin.
metal
You are wrong ! - Cold water is heavier ( denser ) than hot water.
Thermal energy will move from the hot to the cold until their temperatures are identical.
Cold water is denser then hot water and weighs more so hot water will always stay on top of cold water no matter the pressure in the line or volume unless forced by flow hot water water will always be on top.
cold water is denser than hot water. The same is true of most other substances as well.