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an alternating copolymer is known to have a number-average molecular weight of 100000 gmol and a degree of
the 60w fan of a central heating system is to circulate air through the ducts the analysis of the flow shows that the
a radiator wall measuring 2 m by 3 m wxh is held a temperature of 125 degc straight aluminum fins k 175 wmk are to be
consider a 210 mw steam power plant that operates on a simple ideal rankine cycle steam enters the turbine at 10 mpa
a rotating saw blade has 48 teeth and 4 slots if the room where the saw is used is illuminated with a pulsed light
a specimen of aluminum having a rectangular cross section 10 mm x 127 mm is pulled in tension with 25500 n forces
an ideal gas with temperature independent cp72r at 15c and having an initial volume of 60m3 is heated at constant
the following are intended to be practice problems to better understand the economic formulae that are used in
a cold air-standard brayton refrigeration cycle has a pressure ratio of 4 and a refrigeration rate of 15 kw air enters
a hydraulic cylinder has a piston diameter of 22 inches a fluid pressure of 1100 psi a flow rate of 132 cubic inches
a bioengineer is trying to determine the amount of gap developed between bone and cement when a femoral hip is placed
a 680 liter oxygen tank is filled to the pressure of 137 mpa and used to help a respiratory patient in a room with a
half a kilogram of nitrogen initially at 350k and 200kpa is compressed through a poly tropic process with pv14 constant
we have 025 lb of refrigerant 134a at 35 psi and a quality of x015 if it is expanded in a constant pressure process to
calculate the change in free-energy associated with the formation of a critical spherical nucleus in pure liquid nickel
a meteorologist uses a pitot -static tube to measure the wind speed in a tornado based on the damage caused by the
an electric motor draws a current of 10 amps with a voltage of 110 v the output shaft develops a torque of 97 nm a
sea water p1025 kgm3 flows through a pump at 021 m3s the pump inlet is 025m in diameter at the inlet the pressure is
the drag force on an object depends on the dimensionless drag coefficient the density of air the object velocity and
a 1-m tank contains air at 10oc and 350 kpa is connected through a valve to another tank containing 3 kg of air at 35oc
a well-insulated turbine operating at a steady state develops 23 mw of power from a steam flow rate of 40 kgs the steam
liquid oxygen lox is being shipped through interstellar space in a spherical tank constructed of several layers of
air undergoes two processes in series process 1-2 polytropic compression with n 13 from p1 100 kpa v1 004 m3kg to v2
iron is a polytropic material at room temperature it has a bcc crystal structure alpha-iron or ferrite upon heating