coffee
Powdered juice dissolves faster in hot water, but tastes better in cold water.
salt dissolve faster in hot water
Sugar.
Somewhat, but it dissolves faster in warm water.
yes
Probably hot water.
Sugar dissolves faster in hot water, because the water molecules move about faster when they are hot so, when you pour in sugar, the water mollecules will collide with the sugar and theredore sugar dissolves faster in hot water.
salt
salt in hot water
salt in hot water
If you are asking if stuff dissolves faster in hot water then in cold water, the answer is yes. If that is not what you are asking, you'll have to clarify your question.
Sugar sinks at the same rate in warm or cold water. Sugar dissolves faster in warm water.