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During an experiment, an aerospace engineering student measures a wind tunnel's velocity N times. The student reports the following information, based on 90% confidence, about the finite data set: mean velocity=25 m/s, velocity standard deviation=1.5 m/s, and uncertainty in velocity = +- 2.61m/s. Determine N the standard deviation of means based upon this data set (m/s) the uncertainty at 95% confidence, in the estimate of the true mean value of the velocity in m/s the interval about the sample mean over which 50% of the data in this set will be (m/s)
determine the required volume of the cuts and fills for a new road using the
what is the net force exerted on a vertical 18c rectangular plate that is 3m tall 5m wide and whose top edge is 2m
if you find another software easier to do fea in then go ahead and use that instead we are just interested in the
an engineer has proposed that a simple ideal rankine cycle that uses refrigerant-134a be used to produce work with heat
a steady frictionless air at 100 kpa and 25 c flows in a horizontal duct that has a cross sectional flow area reduction
a piston weighing 35 lb slides down a vertical cylinder. the radical gap between the piston and cylinder is 0.002 in.
an axial flow compressor stage has blade rootmean and tip velocities of 150200 and 250 ms. the stage is to be designed
refrigerant 134-a enters a condenser of a residential heat pump at 800 kpa and 35oc at a rate of 0.018 kgs amd leaves
an overall balance around part of a plant involves three inlets and two outlets which only contain water. all streams
in space ships heat rejection to the surroundings is by radiation. a radiator in a space ship has an absorptivity alpha
molybdenum forms a substitutional solid solution with tungsten. calculate the concentration in weight percent of
A 2 cm horizontal jet of water with a velocity of 15 m/s is spraying onto a vertical plate attached to a cart moving opposite the direction of the water jet at 8 m/s. Determine the force required to keep the cart moving at a constant velocity.
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