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A late-model Hummer has a frontal profile area of 3.1 m2 and a CD of 0.47. It is moving at a steady speed of 75 mph. a) If we ignore bearing friction, rolling resistance and "Johnny Law", how much power (in English units of hp) is needed at the wheels on level ground? b) If the engine/drivetrain efficiency (from fuel to the driving wheels) is 34 %, and the heating value of the gas is 44.5 MJ/kg, how much gas will we be using in gallons/hour?
Consider a flow with a pressure and temperature of 2332 lb/ft2 and 498 deg. R, respectively. A Pitot tube is inserted into this flow and measures a pressure of 8065.2 lb/ft2. What is the velocity of this flow? Is the flow supersonic? Use appen..
assume that in a certain area the atmospheric lapse rate ?gamma subscript actual is equal to zero from the ground up to
determine the radial acceleration of a point on the outer surface of the 36 inch diameter tires of a jet-powered car
water vapor is heated in a closed rigid tank from saturated vapor at 160degc to a final temperature of 400degc.
1. A Brayton cycle uses air and produces a net work of 14000 Btu/s with an inlet state of 60°F, 14.7 psi and a compression ratio of 16. The heat added in the combustion process is 400 Btu/lbm. If the thermal efficiency is 0.547 Determine: Using va..
during a simple orienteering exercise a person walks 250 m south then 620 m at an angle of 30 north of east and finally
Derive at least four concept designs to satisfy the given specification - draw a central cross-section of the heat exchanger
natural gas at 70 f and standard atmospheric pressure of 14.7 psi is compressed isentropically to a new absolute
the 8 kg sack slides down the smooth ramp. if it has a speed of 1.5ms when y.2m. determine the normal reaction the ramp
when using labview applying a voltage to the dc motor and examining its angular rate can be done using the modeling
the rigid gateoab of fig. p2.58 is hinged ato and rests against a rigid support atb. what minimum horizontal forcep is
consider a container of volume 250ml that is divided into two compartments of equalnbspsize. in the left compartment
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