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A 60 mph wind blows against a football stadium scoreboard that is 36 ft tall, 80 ft wide, and 8 ft thick (parallel to the wind). Estimate the wind force on the scoreboard. See Fig. 9.28 for drag coefficient data.
The electric field midway between two equal but opposite point charges is 713N/C, and the distance between the charges is 17.7cm. What is the magnitude of the charge on each
An object is placed 20.5{\rm cm} from a screen, find the magnification of the image for each position of the lens
A golf ball with mass 45.90 g and diameter 42.60 mm is struck such that it is moving with a speed of 53.79 m/s and rotating. What is the rotation frequency of the golf ball
A car has 53% of its weight on its front wheels and 47% on its rear wheels, How far from the rear axle is the car's center of gravity
A listener increases his distance from a sound source by a factor of 3.62. what is the change in the sound intensity level in dB
A strip of paper is pulled along at 20m/s at a right angle to the plane of a .49m long pendulum. The pendulum has a small ink jet device to the bob so that it marks the position of the pendulum on the paper. The bob is held 8.0cm to one side and rele..
A meteor streaking through the night sky is located with radar, its has moved to point B, Find the x component of its average velocity between A and B
A lunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.167 kg, and its center of gravity is located at its geometrical center. On the tray are a 1.11-kg plate of food and a 0.262-kg cup of coffee.
The amplitude of the voltage across an inductor can be greater than the amplitude of the generator emf in an RLC circuit. Consider an RLC circuit with Epeak = 50 V, R = 14, L = 1.05 H, and C = 1.12 µ F. Find out the amplitude of the voltage across th..
Illustrate when is velocity of the boulder zero? Illustrate what is the magnitude of the acceleration while the boulder is moving? What is the direction of the acceleration while the boulder is moving?
A garden hose with a diameter of 0.75 in has water flowing in it with a speed of 0.44 m/s and a pressure of 1.1 atmospheres. At the end of the hose is a nozzle with a diameter of 0.25 in.
A transformer is used to operate a model train. The transformer, which is plugged into a standard electrical outlet, find what are the rms currents in the secondary and in primary
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