Condensation
The water on the outside of the cup is an example of condensation.
The cold lemonade cool the temperature of the plastic cup including the outer side of it. Thereby lowering the amount of water the air can contain, resulting in water condensating - attaching to the cup.
When you put cold water inside a cup, you cool the outside surface. If the temperature of the outside becomes less than the dew point of the air surrounding the cup, then condensation takes place. This appears as small drops of water on the outside of the cup. Dew point is a function of humidity and temperature. Dew point condensation is the same process that creates frost and fog in certain weather conditions.
rain
Water does not form on the outside of a cup when you have a hot drink because the heat from the drink is transferred to the cup and prevents the air surrounding the cup from reaching its dew point and forming condensation. This is because the cup acts as a barrier, keeping the outer surface temperature above the dew point.
This is known as an experiment demonstrating the concept of water displacement and the principle of atmospheric pressure. When the candle burns inside the cup, it consumes oxygen, reducing air pressure inside the cup. The higher atmospheric pressure outside the cup forces the water up into the cup to balance the pressure difference.
yes.
A sweating cup is colder than the air which surrounds it.
The water droplets themselves are just water droplets, precipitates, runoff.They got there through condensation, the change of a gas state back to a liquid state, and the reverse of vaporization.
This depends on many factors.
Assuming the glass cup held a cold liquid, the air closest to the cup will be colder than the surrounding air, causing water vapour in the air to condense into liquid water droplets.
Water might disappear on a cup through evaporation. As the water sits, it begins to turn to a gaseous state and rises away from the cup.