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An electric power station is producing 1.60 × 103 W of power that is to be sent to a small town located 11 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 4.50 × 10-2 ?/km. Find the power lost in heating the wires if the voltage is stepped up from 130 V to 1400 V using an ideal transformer.
For a short time, the path of the plane is described by If the plane is rising with a constant velocity of 10 m/s, determine the magnitudes of the velocity and acceleration
What fraction of incident intensity is transmitted by system
The equation of a transverse wave traveling along a very long string is y = 5.0 sin (0.055 ?x + 6.0 ?t), where x and y are expressed in centimeters and t is in seconds. Determine the amplitude of propagation of the wave.
What is the final temperature when .032kg of milk at 11C is added to .16 kg of coffee at 91C. suppose the specific heat capactieis of the two liquids are the same as water, and disregard any energy transfer to the liquid's surroundings.
What is the rms speed of nitrogen molecules contained in an 7.9 m3 volume at 2.1 atm if total amount of nitrogen is 1100 mol.
Two charged spheres are 8.45cm apart. They are moved, and the force on each of them is found to have been tripled. How far apart are they now.
Sound enters the ear, travels through the auditory canal, and reaches the eardrum. The auditory canal is approximately a tube open at only one end. The other end is closed by the eardrum. A typical length for the auditory canal in an adult is abou..
A thin, uniformly charged spherical shell has a potential of 720 V on its surface. Outside sphere, at a radial distance of 29.0 cm from this surface, the potential is 434 V.
Water at a pressure of 3.00*10^5 Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to one-fourth its original diameter
A 3.00 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.20 m/s2, find out the force exerted by the rope on bucket of water.
At t = 0 a grinding wheel has an angular velocity of 21.00 rad/s. It has a constant angular acceleration of 21 rad/s^2 until a circuit breaker trips at 2.40s. From then on it turns during 344 rad as it coasts to a stop at constant acceleration.
A parallel-plate capacitor has fixed charges +Q and -Q. The separation of the plates is then doubled. (a) By what factor does the energy stored in the electric field change? (b) How much work must be done in doubling the plate separation from d to..
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