Why is the melting of an ice cube an example of a physical change? A. because a new substance forms
B. because the change is reversible
C. because the melting ice releases energy
D. because the water has different properties than the ice

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.