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The wings of old airplanes are often strengthened by the use of wires that provided cross-bracing as shown in Fig. P9.106. If the drag coefficient for the wings was 0.020 (based on the planform area), determine the ratio of the drag from the wire bracing to that from the wings.
Lasers can be utilized to drill or cut material. One such laser generates a series of high-intensity pulses rather than a continuous beam of light. Each pulse contains 500mJ of energy and lasts 9.0ns. The laser fires 10 such pulses per second.
A cylindrical electromagnet contains a uniformly magnetized core having a magnetization of 1.9 106 A/m, Find the magnetic field in the core
Discuss the key elements of the political culture in the state of Texas-as outlined in class. Why do you think Texas developed this unique political culture? What aspects of the culture do you find to be the most and least attractive and why?
Young Jeffrey is bored, and decides to throw some things out of the window for fun. But since he is also very curious, he decides to do so in a controlled way.
a very thin circular disk of radius r 13.00 cm has charge q 20.00 mc uniformly distributed on its surface. the disk
an automobile tire has a gauge pressure of 200 kpa cold. after being driven on a hot day the gauge pressure rises to
in the bohr model of the hydrogen atom an electron in the 4th excited state moves at a speed of 1.37 105 ms in a
If you use 50 J of work to push a charge into an electric field and then release the charge, as it flies past its starting position, what is the kinetic energy?
an iron ball suspended by thread of negligible mass from an upright cylinder that floats partially submerged in water. What is the radius r of the iron ball
A 0.16 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by the following equation.
Why should the voltmeter and ammeter be read simultaneously to decide the resistance of a circuit component? A radio with a resistance of 40 ohm and a clock with a resistance of 20 ohm are connected in series on a 120V line. What is the current? Wha..
A pulley system has an efficiency of 87.5 percent. How much of the rope must be pulled in if a force of 648 N is is needed to lfit a 150kg desk 2.46m .
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