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A car has the following characteristics: weight = 18000 N; cross-sectional area = 2.5 m^2, drag coefficient = 0.5; rolling friction coefficient = 0.02. The energy content of gasoline is 3.5E10^7 Joules/Liter. The efficiency of fuel use varies with engine and drivetrain operation as described below.
(a) First consider highway driving. Assume a constant velocity of 27 m/s (60.4 mph) on level ground. Under these conditions the efficiency of the engine plus auxiliaries is 30 percent and the efficiency of the drivetrain is 85 percent. What is the fuel consumption in miles/liter under these conditions? Assume the density of air = 1.2 kg/m^3.
(b) Next consider city driving. As you know from your own experience, this is mostly start-stop driving. Assume that there are three start-stop cycles per kilometer of travel (five per mile). For each cycle the car starts from rest, accelerates up to 13 m/s (29.1 mph), then instantaneously stops. Under these conditions the net engine efficiency drops to 20 percent, and the drivetrain efficiency is 80 percent. What is the fuel consumption (miles/liter) for this city driving cycle?
Compute the maximum acceptable tensile service load T that may act on a single angle L6x4x3/4 that is welded along only one leg to a gusset plate; thus, there are no holes. The service load is three times the dead load. Solve for a0 A36 steel.
If the Greenshields model describes the relationship between speed and density on the highway, the jam density of the highway is 112 veh/mi, and the mean free speed is 64.5 mph,
the voltage for registering a bit of 1 on ethernet can be as low as 2.5 volts or event 1 volt.why is this so low when
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The total volume of the house is 650 m3 (assume that the volume is well mixed throughout). The radon source emits 250 pCi/s (A picoCurie [pCi] is a unit proportional to the amount of radon gas and indicates the amount of radioactivity of the gas)
If a mass of 500kg is placed centrally on the top face of the buoy, find the maximum height of its centre of gravity above the bottom of the buoy so that the buoy may remain in stable equilibrium.
Ernst & young is currently providing support to various sectors. In this regards it was felt that if this report is able to document good practices currently being adopted or planned in ceramic sector.
If the amount of heat transfer in the HE unit is 2460 kJ per kg of steam, what is the magnitude of shaft work obtained from the turbine in kW?
Determine the differential settlement between the centre line of the ring beam and under the centre of beam. The inner and outer radii of the ring beam are 8m and 12m respectively.
Using the Hazen-Williams approach (seecoefficient table below), find the headloss of water flowingthrough 1,000-ft of 6-ft diameter concrete pipe at a flow rate (Q)of 80 ft3/sec
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