In a locker room at 20oC (293 K), a football is filled until the gauge reads 12.5 psi or 86 kPa. This is relative to the atmospheric pressure of 101 kPa, so the absolute air pressure in the ball is 187 kPa. The ball is taken out to the field and reaches thermal equilibrium at 10oC. Assuming the volume of the ball is constant, what is the absolute and relative pressure inside the football

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?

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.