Lami's theorem. (mechanics). When three forces act on a particle in equilibrium, the magnitude of each is proportional to the sine of the angle between the other two. 1  Facebook.
Variable reactions: Brown recluse spider's bite can cause no reaction, a mild reaction, an immediate or a delayed reaction. With a significant reaction a which blister appears after bit. The surrounding skin becomes hard, swollen & can be red, white & blue. A deep lesion can develop which can eat through fat and muscle.
Bites from black widow and brown recluse spiders cause visible symptoms but they may also require medical care if the symptoms worsen. Because most people donât feel the bite when it happens, it can be hours or days before symptoms are noticed, which increases the chances of complications from these spider bites.