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The main of a transformer has 100 turns and its secondary has200 turns. If the power input to the primary is 100W, we can expect the power output of the secondary to be (neglecting frictional losses).....
Two people start at the same place and walk around a circularlake in opposite directions. How long will it be before they meet
A 3.80-kg cylindrical rod of length 2.00 m is suspended from a horizontal bar so it is free to swing about that end. What is the angular velocity of the rod immediately after the collision
the distance between 2 telephone poles is 50.0 m. when a 1.00 kg bird lands on the telephone wire midway between the
A 87-kg snow skier is being pulled up a 10 ° slope by a steel (Young's modulus 2.0 x 1011N/m2) cable. what is the original (unstretched) length of the cable
carefully explain how the third law of thermodynamics contradicts the equipartition of energy theorem. what is the
One kilowatt·hour (kW·h) is the amount of work orenergy generated when one kilowatt of power is supplied for a timeof one hour. A kilowatt·hour is the unit of energy used bypower companies when figuring out your electric bill. Determine the number..
The energy in a lightning bolt is enormous. Consider, forexample a lightning bolt in which 29C of charge moves through apotential difference of 1.4*108 V. With the amountof energy in this bolt, how many kilograms of water at100o C could be boiled int..
A car slows down with an acceleration that has a magnitude of3.2 m/s2. While doing so, it travels 120 m in the + xdirection and ends up with a velocity of +4.0 m/s. a) what is the car’s initial velocity?
a batter hits a fly ball which leaves the bat 0.88m above the ground at an angle of 62 with an initial speed of 29m/s heading toward centerfield. how far from home plate would the ball land if not caught
A top spinning at 4.00 rev/s comes to a stop in 64.0 seconds. Assume that the top slows down at a constant rate. How many revolutions does it make before coming to a stop
Your telescope has a 700mm-focal-length objective and a 26-mm-focal-length eyepeice, You position film so that it caputures the image produced by the objective lens. What is the diameter of that image
our sun is 2.3 x 104 ly light-years from the center of our milky way galaxy and is moving in a circle around that
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