Here's the formulae sheet that will be provided: Formulae Sheet Perimeter, area, surface area and volume formulae Where r is the radius of the sphere or cone, l is the slant height of a cone and h is the perpendicular height of a cone: Curved surface area of a cone = πrl Surface...
The formula for computing the decibel equivalent of a power ratio is dB = 10 log (power ratio) = 10 log (P1/P2) (1) or if voltage is used dB = 20 log (voltage ratio) = 20 log (V1/V2) (2) For equations 1 and 2 to produce ...