Which is an unsaturated solution? a. A sugar cube dissolves when added to a cup of coffee.
b. A KCl crystal added to a KCl solution does not change in size.
c. A layer of sugar forms in the bottom of a glass of iced tea.
d. The rate of crystal formation is equal to the rate dissolved.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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