In college we had a joke:

Those who study engineering learn to ask "how does that work?". Those who study the sciences learn to ask "why does that work?" Those who study account learn to ask "how much will that cost?" Those who study liberal arts learn to ask "do you want fries with that?"

This is a bit self-serving, it having come from an engineering school (where I was a CS student), but there's some truth in there.