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An x-ray machine uses 260 kV rms at80.0 mA rms when it is operating. The power source is a 420 V rms line.
a) What must be the turns ratio of the transformer?b) What is the rms current in the primary?c) What is the average power used by the x-ray tube?
A 34.0-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 225 N. What is the final speed of the crate after being pulled these 21.0 m
A 115-? resistor, a 51.7-mH inductor, and a 154-?F capacitor are connected in series to an ac generator. At what frequency will the current in the circuit be a maximum
question1mainly cars have a speedometer odometer and a clock.a illustrate how you might use these devices to determine
A scuba tank has a volume of cm2. For every deep dives, the tank is filled with (by volume) pure oxygen and 50% pure helium. What is the ratio of the rms speeds of the two types of molecules
In a mall, a shopper rides up an escalator between floors. At the top of the escalator, the shopper turns right and walks 9.41 m to a store. The magnitude of the shopper's displacement from the bottom of the escalator to thestore is 16.0 m. The v..
A 1800·kg car traveling with a velocity of 15·m/s north collides head-on with a 3600·kg truck traveling with a velocity of 20·m/s south. what is the velocity of the truck immediately after the collision
A block of ice starts from rest on an apartment building's roof, which slopes at 41° below the horizontal. How far from the building does the block strike the ground
The current in a 51 resistor is 0.14 A. This resistor is in series with a 28 resistor, and the series combination is connected across a battery
A lightweight string of length 60cm is attached to the ceiling at points separated by distance. Three objects of equal mass are hung from the string, separating the string into 4 equal segments of length L. If θ = 40, find the measure of angle φ a..
A spaceship of mass m is located between two planets of masses M1 and M2; the distance between the two planets is L, What is the position of the spacecraft
A diver springs upward with an initial speed of 2.19 m/s from a 3.0-m board. What is the highest point he reaches above the water
A 650 kg elevator starts from rest. It moves upward for 4.50 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. What is the average power of the elevator motor during this period
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