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A X-ray with a copper target is operated at 44mA and 40kV. If the X-ray tube current is reduced to 40mA, what will be the percent change in the number of Cu K x-rays that are produced with the x-ray tube?
Two identical 1.50 kg masses are pressed against opposite ends of a light spring of force constant 1.75 N/cm , Find the Speed of each mass when it has moved free of the spring on a frictionless horizontal table
A system with m = 0.041 kg , k = 25 N/m and b = 0.33 kg/s is driven by a harmonically varying force of amplitude 4.7 N. Find the amplitude of the steady-state motion
Two parallel plates are 4.0 cm apart. The bottom plate is charged positively and the top plate is charged negatively, producing a uniform electric field of 5.0 * 10 exp 4 N/C in the region between the plates.
n = 4.64 mol of Hydrogen gas is initially at T = 343 K temperature and pi = 2.01×105 Pa pressure. How much work did the external force perform
A car battery has a rating of 230 ampere·hours (A·h). This rating is one indication of the total charge that the battery can provide to a circuit before failing.
A container holds 2.0 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinematic energy of an 8.0 X 10^-3kg bullet with a speed of 770m/s
An insulating sphere has a total excess charge Q distributed uniformly throughout the shere. Use Gauss's Law to calculate the electric field inside the sphere at a distance r
A uniform electric field of magnitude 400V/m is directed in the positive x-direction. A10 µC charge moves from the origin to the point (x, y) = (20 cm, 50 cm). What was the change in the potential energy of this charge?
A 2kg box is released, from rest, at the top of a rough circular track of radius 10cm. calculate the work done by all resistive forces
The electric field between the plates of a parallel plate capacitor is horizontal, uniform, and has a magnitude of 3.5*10^4 N/C. What is the angle made by the thread with the vertical axis
Average Rate of Work The loaded cab of an elevator has a mass of 3.00 multiplied by 103 kg and moves 235 m up the shaft in 23s at constant speed. At what average rate does the force from the cable do work on cab.
A horizontal water main with a cross-sectional area of 188 cm^2 necks down to a pipe of area 49.0 cm^2. Determine the flow rate through the system
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