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

To see how mass conservation places restrictions on the velocity field, consider the steady flow of ... with one inlet and one outlet. This equation is called the continuity equation for steady ...

The two main factors which affect the terminal velocity of an object falling through a fluid are the mass and the shape of the object. The larger the mass of the object, the greater the weight.