Physics is filled with equations and formulas that deal with angular motion, Carnot engines, fluids, forces, moments of inertia, linear motion, simple harmonic motion, thermodynamics, and work and energy. Here’s a list of some important physics formulas and equations to keep on hand — arranged by topic — so you don’t have to go searching […] polymer. Adjusting the silicone rubber formula, using a different curing agent, and/or post-curing can help prevent softening in hot, sealed conditions. Such products are also available. Operating life of silicone rubber in high-temperature conditions (Operating life defined as the time at which elongation at break is 1/2 that of the initial value) The formula for the sum of the natural numbers can be used to solve other problems. The sum of the first n odd natural numbers is (2k-1 represents any odd number): [6.1] We can expand the left-hand side: [6.2] And use our formula for the sum of the natural numbers: [6.3] Rounding up like terms, the sum of the first n odd natural numbers is: [6.4] Tolerance as acceptable range PD Funkenbusch (ME 222/424) 4 Set maximum and minimum values for some characteristic (e.g. part length). LSL = Lower Specification Limit USL = Upper Specification Limit For simplicity we will assume that the average value (m) is midway between the LSL and USL. Tolerance = D LSL = m - D USL = m + D