A workman of weight W stands on the end of the floorboard. This causes the floorboard to tip up. The support are each 0.060m thick. Calculate the weight of the workman.

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?