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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?
What is the value of a current in the smaller loop that would result in zero total magnetic fields at the center of the two loop system.
A landscape architect is planning an artificial waterfall in a city park. How far from the wall will the water land
An He+ ion has one electron , just as a hydrogen atom does , but has two protons in its nucleus instead of just one .Find a formula for the wavelength lambda of an emission line for this ion in terms of the magnitude of the hydrogen ground-state ene..
A spacecraft is in a circular orbit of radius 3.3*104 km arounda 1.9*1030 kg pulsar. The magnetic field of the pulsar at that radial distanceis 1.6*102 T directed perpendicular to the velocity of the spacecraft.
To fight a fire on the fourth floor of a building, firefighters want to use a hose of diameter 6.31cm to shoot 925 liters/minute of water to a height of 11m, What pressure must the water have inside the hose
an astronaut swings a pendulum on the moon, which has a length of 1 m and oscillation period of 4.916 seconds. by what factor is the earth's gravity stronger
A daredevil on a motorcycle leaves the end of a ramp with speed of 35.0 m/s, what is the max height that he reaches
A railroad car of mass 2.4 104 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
Consider a particle moving in an elliptical orbit in an inverse square law central force field. What is the eccentricity of the orbit
two students stand poised to leap off a high dive structure into teh swimming pool below. Student B is twice as massive as student A. Find the magnitude of velocity of canoe relative to river.
Light is diffracted when it passes through a narrow single slit. What happens to the width of the central maximum in the diffraction pattern when the width of the slit trough which light passes is reduced.
a ball thrown horizontally at 26.26 ms travels a horizontal distance of 38.45 m before hitting the ground. from what
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