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1. What is newtons first law of motion
an object in motion tends to stay in motion and an object at rest tends to stay at rest unless acted upon by an unbalanced force
2. the formula for force is
F = ma
3. Newtons first law is also called what
Law of inertia
4. inertia is:
the more ____   an object has the more inertia it has
• the tendency of an objected to resist changes in its state of motion
• mass
5. what law states that all objects have inertia
First law of sir isaac newton
6. What is newtons second law
force eqals mass times acceleration
7. what is acceleration
a measurement of how quickly an object is changing speed
8. force is directly proportional to ____ and _____
mass and acceleration
9. what is newtons third law
for every action there is an equal and opposite reaction
10. what is kinetic energy
what is potential energy
the energy of motion like a rubberband flying through the air or water falling

energy that is store in object which can be converted to kinetic energy like pulling a rubber has pt energy and flinging in air it now has kinetic energy (motion)
11. what is the four paths that the film goes through while processing
developer fixer washer dryer
12. In the developer solution what is the function of the activator
increases the ph of the solution; which causes gelatin to swell
13. what is the function of the restrainer
it limits the development of only the exposed silver halide crystals
14. what four things are in the fixer solution
• activator
• clearing agent
• hardener
• preservative
15. what does the activator do in the fixing solution
stops developer action by drving down ph
16. what does the hardner do in the fixing solution
shrinks and hardens the emulsion
17. What is a water spot
an artifact that occurs as a result of replenishment rates being incorrect if the squeegee mechanism is defective or if the dryer is malfunctioning
18. What is a slap line artifacts
a plus density line perp to the direction of film travel that occurs near the trailing edge of the film
19. what are pick off artifacts
are small clear areas of the film where emulsion has flecked off the film base
20. what are wet pressure mark artifacts
occur when the pinch rollers apply too much or inconsistent pressure to the film in the developer or in the developer to fixer crossover racks
21. what happens if developer concentration is too high
overdevelopment occurs
22. what does H & D stand for
Hurter Driffield
23. what is a sensitometer used for
How does it do this
where is it mainly used
to expose film to a standardized range of light exposures

It shines a light through an optical step tablet which is a sheet of film that has different density steps on it

Darkroom only
24. What is a densitometer
measures the OD on a film
25. What are 2 other names for the H&D curve
characteristic curve and sensitometric curve
26. what are the properties of the H&D curve (4)
• Base plus fog
• Speed
• Contrast
• Dmax
27. why is the linear region important on an H&D curve
this is the area for diagnostic range
28. What is gamma when describing contrast on an H &D curve
What are the ranges
• is the maximum slope
• 1.5-2.5
29. What is the average gradient
what is its range
slope between points corresponding to max and min useful densities

.5-2.5
30. What three steps are part of the daily monitoring procedure
• Expose a film with sensitometer
• process film
• measure data with densitometer
 Author: anatomy12 ID: 284860 Card Set: RAD-275 RADIOGRAPHIC PHYSICS & FILM PROCESSING Updated: 2014-10-07 17:42:45 Tags: xray Folders: Description: xray Show Answers: