Our physics expert picks his top-five equations, plus a scheme to supply US power needs with a bucket of baseballs. Thanks, ...

If we ignore gravity, then the pressures over the inlet and outlet areas are constant. Along a streamline on the centerline, the Bernoulli equation and the one-dimensional ... be found from standard ...

So, for a fixed mass of gas at a constant pressure, volume ÷ temperature will remain the same. Boyle’s Law states that for a gas at a constant temperature, pressure × volume is also constant.