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Extensive testing of an experimental 2820-lb automobile reveals the aerodynamic drag force FD and the total no aerodynamic rolling-resistance force FR to be as shown in the plot. Determine (a) the power required for steady speeds of 22 and 44 mi/hr on a level road, (b) the power required for a steady speed of 44 mi/hr both up and down a 5-percent incline, and (c) the steady speed at which no power is required going down the 5-percent incline.
At one section in an air distribution system, air at 14.7 psi and 100degree F has a velocity of 1200 ft/min a and the duct is 12 in x12 in square. At another section the duct is round with a diameter of 18 inches and the velocity is 900 ft/min. Calcu..
A rock weighs 90.8 N in air and 45 N when completely submerged in water. Determine the specific volume of the rock in m3/kg
A turbine extracts energy from water flowing through a 11-cm-diameter pipe at a pressure of 700 kPa with an average velocity of 11 m/s. If the turbine is 90 percent efficient, how much energy can be produced if the water is emitted from the turbine t..
1750g of air performs an expansion work of 3100kJ on the surrounding as it expands isothermally to a pressure of 63000kPa ad a volume of 0.065 cubic meters. Determine the temperature of the air and the initial volume.
In a polytropic process, a fluid is compressed to 2.75 times its initial pressure, whereas its temperature becomes1.65 times. What is the fluids index of expansion, n? 1.2kg of Air at a pressure of 2.15MPa and a temperature of 585K, undergoes a rever..
Air exerts a pressure of 900KPa within a 0.45 cubic meter container of fixed volume. It is cooled such that the pressure falls to 3.25bar. The temperature of the air is then measured and was found to be 285C. Determine the mass of the air, the initia..
Air enters a gas turbine with a velocity of 165m/s and a specific enthalphy of 2800KJ/kg and leaves with a velocity of 135m/s and specific enthalpy of 2175KJ/kg. The heat lost to the surrounding turbine is 32.5KJ/kg. Determine power developed by the ..
Liquid water in a pumped flow system experiences varying pressures as it circulates through the system. One concern in designing any such system is to ensure that cavitation does not occur. If the water temperature during operation of a particular sy..
Five kg of water is in a closed rigid container with a volume of 0.3935 m3 and a pressure of 5.0 MPa. Draw and label the states and process on a P-v diagram and determine the amount of heat removed and work done when the pressure is reduced to 1.5 MP..
Water as a saturated vapor at 600 Â°F is contained in a piston-cylinder device that has an initial volume of 30 ft3. The device undergoes a constant temperature process, until the water reaches the saturated liquid condition. Draw and label the state..
For an assembly line, you need to design a linkage that moves a point P in approximately a straight line over a distance of 24” in one second. It is also specified that P must return from the endpoint back to the starting point in five seconds, givin..
pin a which is attached to link ab is constrained to move in the circular slot cd. knowing that at t0 the pin starts
calculate the transverse modulus of the peek/carbon fiber composite with 30% volume fraction by tow method. the modulus of peek is 3.8 GPa and the modulus of the carbon fiber is 400GPa. assume the reinforcing factor.
landing gear system structural designproblem statement consider the landing gear shown below. working in teprns of two
Movement of stagnant air over a surface typically decreases the pressure that air exerts on the surface it was in contact with, and higher air velocities usually result in more significant pressure drops. This pressure drop from rapidly moving air ac..
the presence of raindrops in the air during a heavy rainstorm increases the average density of the air-water mixture.
solution the slider a has a mass of 2kg and moves in a slot in a vertical sliding plate. i what horizontal acceleration
a cantilever beam 1.5m long has a square box cross section with the outer width and height being 100mm and a wall
two structural members b and c are bolted to a bracket a. knowing that both members are in tension and that p 6 kips
a rigid container is filled with steam at 700 kpa and 200oc. at what temperature will the steam start to condense when
You have a large hydraulic cylinder with a piston diameter of 8.00 inches. The rod of the cylinder is extended 48 inches. The pressure inside the cylinder at time, t = 0.00 sec is 1,000 psig. There is a 10 foot long hose connected to the hydraulic cy..
an ogee spillway of a gravity dam is to be modeled using water. the spillway section is 40 feet high its crest length
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