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What is the voltage of an alternator that produces a current of 0.039 A if it contains a series RCL circuit with a resistance of 300 ohm, an inductive reactance of 650 ohm and a capacitive reactance of 420 ohm?
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Question: A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 2.55 ?C What is the potential difference between the plates? If the charge is kept constant, what will be the potential di ...
Calculate the momentum of a 2100 kg elephant charging a hunter at a speed of 7.50 m/s. kg·m/s Compare the elephant's momentum with that of a 0.0400 kg bullet fired at a speed of 600 m/s. (momentum of elephant / momentum ...
Question: A research submarine has a 30.0cm diameter window 8.80cm thick. The manufacturer says the window can withstand forces up to 1.20 x 10 6 N . What is the submarine's maximum safe depth? The pressure inside the su ...
Question: A pendulum has a period of 1.77 s on Earth. Part A: What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth? Express your answer to two significant figures and include the appr ...
Question: Riders on the Tower of Doom, an amusement park ride, experience 2.0 s of free fall, after which they are slowed to a stop in 0.50 s. What is a 65 kg rider's apparent weight as the ride is coming to rest? By wha ...
Question: A small 100 g cart is moving at 1.20 m/s on a friction less track when it collides with a larger, 1.00 kg cart at rest. After the collision, the small cart recoils at 0.850 m/s. What is the speed of the large c ...
Question: A soap bubble is essentially a thin film of water surrounded by air. The colors you see in soap bubbles are produced by interference. What visible wavelengths of light are strongly reflected from a 390 nm -thic ...
Question: Suppose you have a fixed charge of -15.0 nC at point X. Points A and B are to the right of point X at distances of 20.0 cm and 40.0 cm from X respectively. Calculate the following: a) the potential at points A ...
Question: Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass m and radius of orbit L. The satellites fire rockets that provide the force neede ...
One cubic meter (1.00m^3) of concrete has a mass of 2.30E+3kg, and 1.00m^3 of copper has a mass of 8.92E+3kg. Find the radius of an concrete sphere whose mass is the same as that of an copper sphere of radius 1.28cm?
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