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A very useful active feedback method for controlling things like temperature control systems, servo motors, and flow control valves.

If a is (directly) proportional to b, then a/b is a constant. The relationship is written a proportional b, which implies a=cb, for some constant c known as the constant of ...

A ruled semicircle used for measuring and drawing angles.

Combine the two above squares on the left into the single large square on the right.

A plane figure for which quadrature is possible is said to be quadrable.

The number theta in the quadric (x^2)/(a^2+theta)+(y^2)/(b^2+theta)+(z^2)/(c^2+theta)=1 is called the parameter.

In the American system, 10^(15).

The type of motion executed by a dynamical system containing two incommensurate frequencies.

In the American system, 10^(45).

In the American system, 10^(48).