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A radar speed-measurement device for state police is said to have an uncertainty of +- 4% when directed straight at an oncoming car. When directed at an angle theta from the straight on position, the device measures a component of the vehicle speed. The police officer can only obtain a value for the angle theta through a visual observations having an uncertainty of +- 10degrees. Find the uncertainty of the speed measurements for theta values of 10,20, and 30 degrees
two open reservoirs contain water. they are separated by a wall and a hinged gate at the bottom of the wall. the water
a thin wall tube is subjected to combined tensile and torsional loading. find the relationship between the axial stress
a heat pump utilizes a well-insulated compressor to compress r-134 from a saturated vapor at 160 kpa at a rate of 0.85
a cylinder is fitted with a frictionless piston contains 10 lbm of r-134a at 100 psia 300 f. the system is cooled at
during a race the dirt bike was observed to leap up off the small hill at a at an angle of 60o from the horizontal. if
a cylinder has 0.1 kg air at 25oc 200 kpa with a 5 kg piston on top. a valve at the bottom is opened to let the air out
Bypass air exits at 600 m/s while combustion air exits at 1000 m/s. What is the thrust in kN of this engine?
a passive solar house that is losing heat to the outdoors at an average rate of 50000 kjh is maintained at 22 c at all
one kilogram of water fills a 150-l rigid container at an initial pressure of 2 mpa. the container is then cooled to 40
a steam engine consists of a boiler connected to a turbine. the boiler tank has a volume of 100 l and initially
calculate the work required to compress air from standard atmosphereic pressure to 2.3 atm in kjkg air.a. assume a
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?
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