In high duty pump and fan applications for example, this will mean taking advantage of the

inverse square law of speed to energy consumption to deliver some significant savings in energy use.

g = -4[pi]G[rho](r, t), [nabla] x g = 0, which is Newton's

inverse square law of gravity in differential form.

This is named after Robert Hooke (1635-1703), the English scientist who formulated not only the law named after him, but remarkably, also proposed an undulating theory of light, introduced the term "cell" to biology, postulated elliptical orbits for the earth and moon, and proposed the

inverse square law of gravitational attraction.

He begins with the familiar

inverse square law in terms of simple calculus, then introduces step by step more complicated situations, gradually bringing in more sophisticated mathematical tools.

Hence, there are well-known conversion methods expressing TMR values in terms of percentage depth dose (PDD), phantom scatter factor (Sp), and

inverse square law (van Battun et al, 2002).

While the rates would be expected to follow the usual

inverse square law with distance from the source, our measurements reveal that the air kerma levels themselves do not in general.

The possible level of detail and the existence of highly developed commercial software packages give this approach an inherent advantage over alternatives, such as the

inverse square law (Noakes et al.

The power correlation refers to the Friis' free space transmission equation, where the power at the receiver follows an

inverse square law related to the distance value.

The statement at the bottom of the first column on Page 15, "Using the

inverse square law, intensity is reduced by one quarter every time the distance is doubled," is not correct.