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Nichrome wire of cross-sectional radius 0.791 mm is to be used inwinding a heating coil. If the coil must carry a current of9.25 A when a voltage of 1.20x102 V is applied acroosits ends, find a) the required resistance of the coil and b) thelength of wire you must use to wind the coil.
A steel tube, which is closed at both ends, is filled with air. The air in the tube is vibrating at a frequency of 160·Hz. Use 340·m/s for the speed of sound in air. What is the wavelength of the sound waves in the tube
One particle has a mass of 4.42 x 10-3 kg and a charge of +7.35 %u03BCC. A second particle has a mass of 8.69 x 10-3 kg and the same charge. Find the initial separation between the particles
The longest recorded pass in an NFL game traveled 86 yards in the air from the quarterback to the receiver.Assuming that the pass was thrown at the optimal 45 angle, what was speed at which the ball left the quarterback's hand.
A lava bomb is a missile composed of cooling, practicallysolid lava. You are a geologist, watching a volcano launch a lava bomb straight upward. find the Initial Speed at which the lava bomb got launched
A generator produces 60 A of current at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 Ù
The potential difference across a resting neuron is about 80 mV and carries a current of about 0.10 mA. How much power does the neuron release
Two people with a combined mass of 134 kg hop into an old car with worn-out shock absorbers. This causes the springs to compress by 9.00cm. Find the total load supported by the springs
An aluminum cup of mass 200 g contains 800 g of water in thermal equlibrium at 80.0c. the combination of cup and water is cooled unformly so that temperature decreases by 1.50c per minute. at what rate is energy being removed by heat.
A piston in a gasoline engine is in simple harmonic motion. If the extremes of its position relative to its center point are ± 4.50 cm, find the maximum velocity and acceleration of the piston
A daredevil decides to jump a canyon. Its walls are equally high and 12 m apart. What minimum speed must he have in order to clear the canyon
The aurora is caused when electrons and protons, moving in earth's magnetic field of 5x10^-5 T, collide with molecules of the atmosphere and cause them to glow. What is the radius of the circular orbit for (a) an electron with speed 1.0×10^6 and (b) ..
A farsighted person has a near point of 50-cm from her eyes. She wants glasses that would let her see objects at a distance of only 25.00 cm from her eyes. Determine out the focal length of the glasses needed if the glasses are 2 cm and 3 cm from ..
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