He may have an employment contract in place which gives additional protections. It’s much more likely for a Harvard professor than your average worker.

A quick search shows it’s prohibited in just 4 states. Many states have conditions that apply to configuration of rifles (and shotguns) such as capacity limits, so those would affect them the same.

Isn’t the AR-15 the most popular rifle to hunt with in the US?

But they are just as directly related.

It might be funny if it were true, but it’s just a sad show of ignorance. It is exactly as possible in one as in the other for obvious reasons. It’s just not as easy to memorize.

To be specific:

• energy required to heat to boiling point 1180 kJ
• energy required to convert to vapor 8420 kJ
• energy required to heat to boiling point and convert to vapor 9600 kJ