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A transmission line that has a resistance of 0.5 omh per km of length is used to transmit 200 MW across 300 miles. If the line loss is to be limited to 1% of the power transmitted, what should be the transmission voltage?
A 3.2 kg block of wood sits on a table. A 3g bullet, fired horizontally at a speed of 490 m/s, goes completely through the block, emerging at a speed of 250m/s. What is the speed of the block immediately after the bullet exits.
To stretch a certain spring by 2.70 cm from its equilibrium position requires 7.00 J of work. What was the maximum force required to stretch it by that distance
A person having a mass of 59.1 kg stands before a flight of 30 stairs each of which is 25 cm high. How much work did he do in overcoming gravity
predict how to changing the variables may effect the distance traveled or the speed of the race car.
The temperature of a black body can be estimated based on the wavelength of light that it is emitting, Find the surface temperature of a star
A piece of cheese with a mass of 1.30kg is placed on a vertical spring of negligible mass and a force constant k= 1600 N/m that is compressed by a distance of 16.2cm. how high does the cheese rise from this initial position
We can approximate an electron moving in a nanowire as a one-dimensional in?nite square-well potential. What are the three lowest energy levels of the electrons
A set of 20 stairs, each of 20-cm height, is ascended by a 700 N man in a period of 1.25 s. Compute the mechanical work, power, and change in potential energy all through the ascent. I have 2800J. Where do I go from here.
Expalin how many revolutions will the car have gone through when the magnitude of its total acceleration is 2.00 m/s^2?
it takes 60 joules of work to move 2 coloumbs of charge from point A to point B. what is the potential difference between point A and point B
If you throw a .038 kg ball at a speed of 10.9 m/s and at an angle of 43.5 above the horizontal from a 14.8m high building, what will its kinetic energy be when it hits the ground
Calculate the inductance of a solenoid with 275 turns if the length of the solenoid is 30 cm and its radius is 2.5 cm
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