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1. The drag coefficient for a newly designed hybrid car is predicted to be 0.21. The cross-sectional area of the car is 30 ft2. Determine the aerodynamic drag on the car when it is driven through still air at 55 mph.
2. A 5-m-diameter parachute of a new design is to be used to transport a load from flight altitude to the ground with an average vertical speed of 3 m/s. The total weight of the load and parachute is 200 N. Determine the approximate drag coefficient for the parachute.
A hollow circular steel shaft has a 100-mm outside diameter and a 75-mm inside diameter. Calculate the allowable torque that can be transmitted if the allowable shear stress is 62 MPa.
the 50-kg crate is now projected down an incline as shown with an initial speed of 7 ms. investigate the time t
Two oil tanks are connected by two 9-m-long pipes, as in Fig. P6.26. Pipe 1 is 5 cm in diameter and is 6 m higher than pipe 2. It is found that the flow rate in pipe 2 is twice as large as the flow in pipe 1.
100 kmol/h of biogas (75 mol% CH4 and 25 mol% CO2) is produced in a digester and is drawn off from the headspace under a slight vacuum and piped to a natural gas burning boiler. A slight leak develops in the pipe allowing air (79 mol% N2 and 21 mol% ..
a 10 cm x 10cm sheet of material is 2 cm thick and made of a material with a conductivity of 0.5wmk?. one side of this
An aluminium bar is subjected to uniaxial tensile loading. If the lateral strain (perpendicular to the load direction) is measured to be -0.00025, determine the axial stress required to induce this strain (round to the nearest ksi).
two block masses on smooth wheels m1 and m2 are connected to the wall through spring having a spring constant of k2
determine the heat transfer per kg necessary to raise the temperature of a closed rigid tank of saturated water vapor
(a) determine the net power developed per unit mass flowing, in kJ/kg, and the thermal efficiency for a compressor pressure ratio of 8. (b) plot the net power developed per unit mass flowing, in kJ/kg, and the thermal efficiency, each versus compr..
Consider a single crystal of nickel oriented such that a tensile stress is applied along a [001] direction. If slip occurs on a (111) plane and in a [101] direction, and is initiated at an applied tensile stress of 13.9 MPa (2020 psi), compute the..
an otto cycle has the lowest temperature of 60degreef and the lowest p as 12psi. the highest temperature is 4040degreef
consider a steam power cycle in which saturated water vapor at 25 bar state 1 enters an adiabatic steam turbine. at the
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