The weight of thousands of snack bars produced by a food company has a normal distribution with a mean of 147.1 g and standard deviation of 12.3 g. a. if the company labels 150.0 g on all the individual wrappers, what percent of bars are lighter than advertised? b. what percent of bars are between 140 and 150 g? c. what weight should be labeled on the wrappers so that only 5% of the bars are underweight? d. between what values do the middle 75% of the weights of the bars lie?

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false