Answer:
Both are physical changes because there is a change in the physical states of ice and sugar
Explanation:
1. melting of ice to water is a change of state from solid to liquid, although there is a change in the physical state but the chemical nature of the water remain unchanged. no new substance is produced since ice and water is the same chemically. since the reaction can be reversed by freezing. This shows a physical change
2. Dissolving sugar cubes in hot coffee is also a physical change since the sugar is dissolved into the coffee but the chemical natures of the sugar and the coffee remain the same. no new substance is formed. that is a chemical change
