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The heating coil of a hot-water heater has a resistance of 20 and operates at 210 V. If electrical energy costs $0.080/kWh, what does it cost to raise 240 kg of water in the tank from 15°C to 89°C?
A solenoid of inductance L = 50 mH has a magnetic energy U = 3 x10-4 J with a density u = 0.0042 J/m3. What is the winding density n of the solenoid
a mirror with a 30 radius of curvature produces an image that is 24 cm in front of the mirror and inverted. where is the object that produced the image located
In a series circuit, a generator (1300 Hz, 10.0 V) is connectedto a 13.0- resistor, a 4.00-μF capacitor, and a4.90-mH inductor. Find the voltages across (a) the resistor, (b) the capacitor, and(c) the inductor.
A computer disk drive is turned on starting from rest and has constant angular acceleration. What is its angular acceleration, in rad/s^2?
A 17000 N automobile travels at a speed of 47 km/h northward along a street, What will the direction of the velocity of the cars be immediately after the collision
A rifle with a barrel length of 64cm fires a 12gbullet with a horizontal speed of 400m/s. What resistive force (assumed to be constant) does the wood exert on the bullet
Capacitors C1 = 5.50 µF and C2 = 2.95 µF are charged as a parallel combination across a 250 V battery. Calculate the resulting charge on each capacitor
Experimenters at the National Institute of Standards and Technology have made precise measurements of the speed of light using the fact that, in vacuum, the speed of electromagnetic waves is c = 1/?(µ0?0), where the constants µ0 = 4? multiplied by..
Two containers hold identical amounts of a monatomic gas at 20. Container A is rigid. What are the initial pressures in containers A and B
A 32g bullet is fired from a rifle at 380 m/s into a water bottle at a pointblank range. The bullet travels completely through the 12 cm long bottle, find the average force exerted by the water on the bullet
How much of the rope must be pulled. Find the magnitude of the magnetic field at the point x = 0, y = 0.7 m, z = 0.
Find the magnetic vector potential inside and outside a slab of thinkness 2a, extending infinitely in x and y directions. Use Coulomb's gauge. J= -J e^-abs(z)/a)
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