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Design a circuit to provide 60 W at 50 V to a resistive lamp from an AC supply of 120 V ± 10% at 60 Hz. The circuit should be energy efficient-that is, it should consume the least power possible.
An 8.70 kg block slides with an inital speed of 1.56 m/s down the ramp at an angle of 28.4 with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.62. Use energy conservation to find the distance the block slid..
A current path shaped as shown in the figure produces a magnetic field at P, the center of the arc. What are the magnitude and direction of the field produced at P if the current is 5.00 A
Suppose you start with the pendulum hanging vertically, at rest. You then give it a push so that it starts swinging with a speed of 8.1 m/s. What maximum angle (in degrees) will it reach, with respect to the vertical, before falling back down?
An artificial satellite is in a circular orbit around a planet of radius r = 2.05 × 103 km at a distance d = 380.0 km from the planet\'s surface. What is the average density of the planet
A handball is thrown straight upward and is in the air for a total time of 8 s. Draw a diagram, label time and velocity every second. Compute the maximum height of the ball in meters
Scientists want to place a 4200.0 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.6 times the radius of Mars above the surface of the planet. obtain the force of attraction between Mars and the satelli..
Two banked curves have the same radius. Curve A is banked at an angle of 11°, and curve B is banked at an angle of 19°. At what speed can this car travel around curve B without relying on friction
A conducting spherical shell with a total uniformly distributed charge of -4Q on the combination of inner and outer surfaces has a point charge at the center of the shell
A coil has 460 turns andself-inductance 3.45 mH. The currentin the coil varies with time according to i = (680mA) cos(πt/0.0250 s).
markings to indicate length are placed on a steel tape in a room that is at a temperature of 22degc. measurements are
An electric vehicle starts from rest and accelerates at a rate of 1.8 m/s2 in a straight line until it reaches a speed of 29 m/s. How far does the vehicle move from start to stop
A diver shines a flashlight upward from beneath the water at a 44.5° angle to the vertical. At what angle does the light leave the water
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