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Consider a single sheet flat plate collector where the ambient temperature is 25C, the insolation is 900 W/m2, and 50percent of the insolation is extracted. Determine the temperature of collector surface [C], and the temperature of the glass sheet [C].
the 500 lbf motor is supported on springs with a total stiffness of 5000 lbfin. the springs have a damping ratio of
An Industrial water shutoff valve is designed to operate with 40lbs of force and will encounter 150lbs of resistance force applied to a 2in diameter axle. What is the required actual mechanical advantage of the system?
stone mix concrete slabs are used to absorb thermal energy from flowing air that is carried from a large concentrating
Given that an activity's normal time and cost are 10 days and $400 and its crash time and cost are 5 days and $800, what is the activity's slope?
Refrigerant 134a at 700 kPa and 40oC is expanded adiabatically in a closed system to 60 kPa. Determine the work produced, in kJ/kg, and final enthalpy for an isentropic expansion efficiency of 80.
as given in the sketch kerosene at 90f is being drained through 100 feet of 4 inch schedule 80 pipe from a storage tank
If a person and a wheelchair have a mombined weight of 185 lb how much ideal effort force is required to travel up the ramp? Can you just explain to me what equation I need for this?
Refrigerant R-134a vapor in a piston-cylinder assembly undergoes a constant-pressure process from saturated vapor at 800 kPa to 50 ºC.
An auto speedometer is graduated in 5 mph increments and has an accuracy rated to be within ±4%. Estimate the uncertainty in indicated speed at 60 mph.
the basis of a design project which will be completed. you should therefore think carefully about which of the
A small hoist is mounted on the back of a pickup truck and is used to lift a 500N crate . Determine the force exerted on the hoist by the htdraulic cylinder BC, the reaction at A.
a student plays two notes on the piano keyboard simultaneously. the white key has a frequency of 352 hz and the black
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