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Manganese was determined in samples of geological interest via X-ray fluorescence using barium as an internal standard. The fluorescence intensity of isolated lines for each element gave the following data:
What is the weight percentage manganese in a sample that had a Mn-to-Ba count ratio of 0.735?
at a given instant train e has a speed of 20ms and an acceleration of 14ms2 acting in the direction shown 75 degrees to
Verify that heating the wire may be treated as a lumped-capacity process, find the steady-state temperature of the wire and find how long it takes for the temperature of the wire to reach 100°C.
the two small 0.2-kg sliders are connected by a light rigid bar and are constrained to move without friction in the
An air-standard Brayton refrigeration cycle maintains a refrigerated space at -230C while rejecting heat to the surroundings at 27oC. The pressure ratio is given as 3, with a mass flow rate of 0.08 kg/s.
Common practice in chemical processing plants is to clad pipe insulation with a durable, thick aluminum foil. The functions of the foil are to confine the batt insulation and to reduce heat transfer by radiation to the surroundings.
a simple slide valve with outside admission provides a lead of 3 mm a maximum port opening of 18 mm and a cut-off at 62
Space stations don't need to be round to have artificial gravity. The tethered spacecraft in the diagram to the right represents an alternative design. Put the astronauts in a passenger capsule. (Put the "spam in a can" as they say.) Tether it to a h..
Calculate the following the (U10050 Stirling motor) Stirling engine: Overall efficiency, thermal efficiency, mechanical efficiency and the coefficient of performance (CoP). assume that the engine is used as electric generators calculate:
The refrigerant R-410a is contained in a piston-cylinder device, as shown in the figure, where the volume is 13 L when the piston hits the stops. The initial state of the fluid is -30 °C, 150 kPa, with a volume of 10 L. The entire system is brought ..
A fourth-order polynomial passes through the five points for which the independent and dependent variables, x and y, respectfully, are given (-2,37), (-1,7), (0,5),(1,13), and (2,61). Find the polynomial by any suitable method. Here, x represents the..
air enters the compressor of an ideal-gas refrigeration cycle at 270 k and 110 kpa and the turbine at 325 k and 440 kpa
What is the equation for calculating the torque of a motor?
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