This is an my topic for my essay. I'd like it if people can post up some theories to this topic. I am investigating why is it that commercial planes have a round nose whereas most fighter planes have sharp noses (Like the beaks of birds) and why F1 cars cars have a conical nose cone instead of a sharp one as they are required to go fast and also, why is it that submarines (designed aerodynamically for smooth and efficient and fast movement under the sea) always have round noses (since water is just a denser medium than air). Can you guys please post up any theories you think? It can be really complicated, no probs.