What is the specific heat of a substance that absorbs 1600 joules of heat when a sample of 18 g of the substance increases in temperature from 20 °C to 31°C? Round your answer
to two decimal places if necessary.

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.