Aircraft, birds, bats, propellers.
haro
priciple
Bernoullis principle
Archimedes.
Airplane,ventrimeter,andpump
= in college: priciple, program language, database,compiler priciple, =
http://en.wikipedia.org/wiki/Bernoulli%27s_principle#Real_world_application
Lord Shiva.
symmetry
To get into deep doodoo by our vice priciple
Sir Issac Newton.
A1V1=A2V2 or V2=(A1/A2)(V1)