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Use the jet flow system of Section 12.4 to analyze the ignition of a stagnant combustible of temperature T∞ and reactant mass fractions Yi,∞ by a hot, inert jet of radius ro and initial temperature To and velocity uo. Assume Sc = 1 for simplicity. This problem is somewhat similar to that of the mixing layer treated in Section 12.3.3, except now the ignition source, that is, the jet, is of finite dimension and, hence, during the induction period is continuously cooled down through entrainment of the ambient gas. Just derive the final structure equation for the inner region, with the appropriate boundary conditions. Discuss the issues of similarity and jet cooling.
an air-core solenoid consists of 200 turns of wire wound on a form that is 45 cm long and has a inner diameter of 2 cm.
a 62.7 kg astronaut is on a space walk when the tether line to the shuttle breaks. the astronaut is able to throw a 11
Over what time interval would the spaceship have to complete one rotation on its axis to make a bathroom scale have the same reading for the person in space as when on Earth's surface?
You want to siphon rainwater and melted snow from the cover of an above-ground swimming pool. The cover is 1.8 m above the ground. You have a plastic hose of 1.0 cm radius with one end in the water on the pool cover and the other end on the ground..
A slit with width 0.22 mm is located 12 m from a screen. If light with λ = 550 nm is passed during this slit, what is the distance among the central bright fringe and the third dark fringe on the screen?
A 2-cm-diameter sphere moves at Re ¼ 10 (separation is just occurring). What is its speed if it is submerged in (a) water at 10-C, (b) air at 40-C and 400 kPa, and (c) water at 90-C.
A 13000 kg railroad car travels alone on a level frictionless track with a constant speed of 17 m/s. A 6500 kg load, originally at rest, is dropped onto the car. What will be the car's new speed.
A toroid having a rectangular cross section (a = 2.00 cm by b = 3.00 cm) and inner radius R = 3.80 cm consists of 500 turns of wire that carries a sinusoidal current I = Imax sin ?t, find the emf induced in the coil as a function of time
Consider an LR circuit like that displayed in Figure 6.6 in Activity 2-1 in your lab manual. You measure the current through the inductor as a function of time, What is the total resistance of the circuit
The work done in accelerating a flywheel from rest to an angular speed of 14.8 revolutions per second is 12.4 kJ. What is the moment of inertia of the flywheel
A gymnast whose mass is 50.0 kg swings back and forth on a 4.0m long rope. What is her velocity at the bottom of the swing
consider two wire coil inductors la and lb. the inductor la is smaller than lb in diameter and la is placed inside of
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