D will because water just turns from liquid to a gas by adding heat. That is a physical change. The other equations are chemical changes.
solution:
You need to find the frequency, and they have already given you the wavelength. And since you already know the speed of light, you can use formula (2) to answer this problem. Remember to convert the nano meters to meters because the speed of light is in meters.
A mineral occurs naturally, meaning that even though there are artificial substances that might be described as mineral-like they are not minerals