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A transmission line is used to send power over a distance of 4.0 kilometer through a copper power line of 1.0Ω/km. The 240 Vrms supply has an internal resistance of 50Ω.
a) The voltage is stepped up to 66 kV by a near-ideal transformer. Determine what turns ratio is required?
b) Find the maximum power that can be supplied from the source?
c) Find how much power is lost in the transmission line?
d) Determine what would be the answer for c) if no transformer were used?
On a cool morning, when the temperature is 14 ^\circ{\rm C}, you measure the pressure inyour car tires to be 30 psi. What pressure will your tire gauge now show
A hunter who is a bit of a braggart claims that, from a distance of 1.5 km, he can selectively shoot either of two squirrels who are sitting 14 cm apart on the same branch of a tree. Determine the diameter of the pupils of his eyes
Suppose a 63.00 kg boy and a 50.00 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.00 m/s2, find out the magnitude of the acceleration of the boy toward girl.
The figure shows the blade of a chain saw. The rotating sprocket tip at the end of the guide bar has a radius of 0.0343 m. Find the angular speed of the sprocket tip in rev/s
Derive the magnitude of the angular momentum vector of the electron in the ground state in tritium.
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you find in part (a). Illustrate what should be the maximum speed of the car so it can round the curve safely?
The coefficient of kinetic friction
what is the best way to study and prepare for a physics exam? and the questions are from the book and i freak myself
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown directly forward
If a low-pressure sodium vapor lamp emits 50 W of yellow light, how many photons does it emit each second
Three equal charges of magnitude +4.00 uC are placed at the corners of an equilateral triangle of side 2 cm. what is the electric potential energy of the system
Consider N atoms confined on a surface of area A at temperature T. The atoms form a two-dimensional (2D) gas of classical, non interacting particles.
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