Evaporate the liquid away. This would also leave other sediment so to get just the sugar you would probably then have to use a centrifuge to separate the various sediments.
because sugar separates from tea!
When sugar is stirred into hot tea, this represents a physical change, specifically the process of dissolution. The sugar molecules break apart and become evenly distributed throughout the liquid, resulting in a uniform solution. This process alters the tea's taste and sweetness without changing the chemical composition of the sugar or the tea.
Dissolve... mixing with the tea.
no
Stirring makes it faster for the sugar to completely dissolve in the tea.
Yes both will weight the same. Because the sugar merrily dissolves in the tea.
Hot tea is capable of dissolving more sugar than iced tea.
Stirring sugar into a cup of tea is a chemical change because when you evaporate the tea you can not get the sugar back, instead you get a mixture of glucose and fructose. It is also a chemical change.
a sugar cube
The cup of tea would become excessively sweet (sugary).
zero
It wouldn't harm you, I suppose you could but it wouldn't be the best cup of tea. :)