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A power line 50km long has a total resistance of 0.60ohm. A generator produces 100V at 70A. in order to reduce energy loss due to heating of the transmission line, the voltage is stepped up with a transformer with a primary to secondary turns ratio of 1 to 100. What percentage of the original energy is lost when the transformer is not used?
Light of wavelength 650 nm falls on a 0.48 mm wide slit and forms a diffraction pattern on a screen 1.8 m away.
Consider an angular motion. If the displacement is given as 250teθ, and the radius r is constant, derive the expressions for the angular velocity θ=ω, angular accelerationα, linear displacements, linear velocitytv, normal accelerationna, and tange..
Particle A and particle B are held together with a compressed spring between them. When they are free, the spring pushes them apart and they after that fly off in opposite directions, free of the spring.
Points A and B have electric potentials of 320 and 160, respectively. When an electron released from rest at point A arrives at point C, its kinetic energy is.
A horizontal beam of electrons initially moving at 3.9 107 m/s is deflected vertically by the vertical electric field between oppositely charged parallel plates as shown in the diagram. The magnitude of the field is 1.70 104 N/C.
a 71 kg baseball lplayer jumps straight up to catch a line drive. If the 140 g ball is moving horizontally at 28 m/s and the catch is made when the ball player is at the highest point of his leap what is his speed immediately after stopping the ba..
When an 82.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2 x 10^3 J. By how much does the potential energy of a 17 kg child increase when the child climbs a normal sta..
A flat sheet of crystalline quartz has a thickness of 1.6 cm. It is on top of the flat sheet of diamond that has a thickness of 2.10 cm. Light strikes the crystalline quartz perpendicularly and travels through it and then throughout the diamond.
A straight, nonconducting plastic wire 8.50 cm long carries a charge density of +175 nC/m distributed uniformly along its length, Find the magnitude and direction of the electric field
A 27 pound meteorite struck a car, leaving a dent 26cm deep in the trunk. If the meteorite struck the car with a speed of 620m/s, what was the magnitude of its deceleration, assuming it to be constant.
Two wires, each 28.15 cm long, are connected to two separate 9.00 V batteries as shown in the figure. The resistance of the first wire is 5.00 Ω, and that of other wire is unknown (R). If the separation between the wires is 4.55 mm, what value of R w..
A hydrometer is used to measure the specific gravity of liquids. For a sure liquid a hydrometer reading indicates a specific gravity of 1.15. What is the liquid's density and specific weight? State the answer in SI units.
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