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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.
What gas pressure will the experimenter measure inside the bulb, A glass bulb contains air at room temperature and at a pressure of 1 atmosphere. It is placed in a chamber filled with helium gas at 1 atmosphere and at room temperature
A collar B of weght W can move freely along thevertical rod. The constant of the spring is k and the spring is unstretched when theta=0. Derive an equation in W thrta k and l that must be satisfied when h collar is in equilibrium.
an air-standard cycle with variable specific heats is executed in a closed system and is composed of the following four
nitrogen is compressed in a polytropic process with n 1.2 from 120 kpa and 10oc to 800 kpa in a piston-cylinder
a 12 kn force is exerted on a rocker arm. the moment of inertia i of the crosssectionnbspwith respect to the
a mixture of methane and air is capable of being ignited only if the mole pecent of methane is between 5 and 15. a
a cup of coffee 12oz 0.0125 ft3 that is at 140 degrees f sits on a desk. after some negligable time the final
a highway curve with a radius of 1200 ft is designed in such a way that the maximum safe speed for a car on this curve
water is pump from a lake to a storage tank at 18m above at a rate of 70 L/s while consuming 20.4 kW of electric power. disregarding any frictional losses in the pipes and any change s in kinetic energy, determine (a) the overall efficiency of the..
the pipe that supplies drinking water to a community in a cold region of the planet is buried a depth of 3m from the
Calculate the static thrusts of the rocket and turbojet engine described in the figure. The thrust T is the force necessary to prevent horizontal movement of the engine. Both engines exhaust a mass flow of 40 kg/s.
the average grain diameter for some metal alloy was measured as function of time at 650degc which is tabulated below at
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