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A thermometer has a time constant of 10s and behaves as a first-order system. It is initially at a temperature of 30°C and then suddenly subjected to a surrounding temperature of 120°C. Calculate the 90 percent rise time and the time to attain 99 percent of the steady-state temperature.
For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.0mm.
what is the specific heat of air in US customary units given that its value in SI units is approximately 1 kN.m/kg.K?
saturated liquid water at 25 degrees c is pumped to a pressure of 5 mpa in an isothermal process. the specific work
the speed of the 3500-lb sports car is plotted over 30 s time period. plot the variation of the traction force f needed
r-22 in a pistoncylinder has mass 1 kg and temp. 10degc with a volume of0.02 m3 . initially state 1 the piston rests on
What are stress concentrations, what causes them, and why should engineers be concerned about them?
a heat engine receives heat from a source at 1200 k at a rate of 500 kjs and rejects the waste heat to a medium at 300
a 2 m3 tank containing nitrogen at 25oc and 500kpa is connected through a valve to another tank containing 3kg of
a gas within a piston-cylinder assembly undergoes a thermodynamic cylce consisting of three processes. process 1-2
Determine the number of revolutions that the motor executes in a) reaching its rated speed, b) coasting to rest.
in a pharmaceutical plant a copper pipe kc 400 wm.k with inner diameter of 20 mm and wall thickness of 2.5 mm is used
draw a schematic of band structure of a compound that has s and p orbitals occupied. show where is the fermi energy and
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