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1. General information about the use of intensifying screens in radiology, and how films intended for use with intensifying screens differ from non-screen films.
2. A discussion of film sensitivity/speed, and the defining equation for this parameter.
3. Using the equations from # 2 and # 3 above, and the equation I = I0 e-μd, derive the equation for the ratio of sensitivity of two films (call them 1 and 2) as a function of tube voltage, tube current, source-to-film distance, exposure time, and linear attenuation coefficient and thickness of the object that produces an image with an optical density of fog level + 1 on the film.
4. A brief introduction on computed radiography, IP construction, and readout.
5. Describe the image receptor response curve for CR.
A satellite with mass 2200kg is initially in a circular orbit a distance 325km above the earth's surface. Due to air drag, the satellite's altitude decreases to 250km. Calculate the change in gravitational potential energy
an irregular object is suspended by a wire from its center. when a torque of .14 N.m is applied, to the object, find the inertia of the object
A concrete highway is built of slabs 8.0 m long (20°C). How wide should expansion cracks between the slabs be (at 20°C) to prevent buckling if the range of temperature is -35°C to +45°C.
Consider a resistor series RC circuit with a 6.7 µF, capacitor, a 4.5 × 10^6? resistor and 38 V emf. Find the maximum charge on the capacitor
A 10.2 cm diameter loop of wire is initially oriented perpendicular to a 1.6T magnetic field. The loop is rotated so that its plane is parallel to the field direction in 0.21 seconds. What is the avg induced emf in the loop?
A player bounces a 0.45 kg soccer ball off her head, changing the velocity of the ball from vector v i = (8.6 m/s)x + (-2.1 m/s)y to vector v f =(5.8 m/s)x + (3.4 m/s)y hat. What is the magnitude of the impulse delivered to the ball
why can you calculate the acceleration due to gravity of a free falling body from either its displacement versus time
An electric field of 300 V/m is confined to a circular area d = 11.1 cm in diameter and directed outward perpendicular to the plane of the figure. If the field is increasing at the rate of 22.0 V/m·s, what are direction and magnitude of the magnet..
question air enters a hot-air furnace at 7degc and leaves at 77degc. if the pressure does not change each entering
A uniform electric field of magnitude 271 V/m is directed in the negative x direction. A +12.7 ?C charge moves from the origin to the point (x, y) = (15.5cm, 46.0 cm). What was the change in the potential energy of this charge?
The power is off for 34.0 s and throughout this time the flywheel slows as a result of friction in its axle bearings. Throughout the time the power is off, the flywheel makes 180 complete revolutions.
A mass-spring system oscillates with amplitude of 4.80 cm. If the spring constant is 228 N/m and the mass is 414 g, Determine the maximum speed of the object
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