# Ch 2 - Vanderschaff

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1. Density =
Mass / Volume
2. Maginification =
SID / SOD
3. Velocity=
Distance / Time
4. Force=
(N)= Mass x Acceleration
5. Weight=
Mass x Gravity
6. Momentum=
(P) = Mass x Velocity
7. Work=
(J) = Force x Distance
8. Power=
(W) = Work / Time
9. KE=
1/2mass x Velocity^2
10. PE=
Mass x Gravity x Height
11. K=
F=
C=
• K=C+273
• F=9/5(C) + 32
• C=5/9 x (F-32)
12. Physics
Interactions of matter and energy in all their forms
13. 3 basic quantities?
• Mass
• Length
• Time
14. 1 Yard =
.9144m
15. 1 inch =
2.54 cm
16. Speed of light =
c=3 x 10^8 m/s
17. gravity formulas?
• g= 9.8 m/s^2
• g=32 ft/s^2
18. 1 Lb =
4.5 N
19. 1 HP =
746 W
20. Meter is defined by...
The distance traveled by light
21. Unit of measurement?
Kilogram
22. Unit of Weight or Force?
Newton or Pound
23. Unit for work
Joule (J)
24. Unit for heat
Calorie
25. Unit for ionization intensity in air?
Roentgen (R)
26. Xray unit output expressed in?
mR
27. What is a kg?
Mass of 1000cm^3 of water at 4 deg Celsius
28. Standard unit of time
Second
29. How is time measured?
By atomic clock and the vibration of cesium atoms
30. Two parts of a unit
• Magnitude
• Unit
31. What are Newton's laws of motion?
• 1.) Inertia
• 2.) Force
• 3.) Action/Reaction
32. Law of inertia?
Body will remain at rest or will continue to move in a straight line at a constant rate unless acted on by an external force.
33. Law of Force?
Force of an object is equal to Mass x Acceleration
34. Law of Conservation of Energy
Energy can be transformed from one form to another, but cannot be created or destroyed
35. The total amount of energy is ____?
Constant
36. What is heat?
KE of the random motion of molecules
37. What is a calorie?
The amount of heat needed to raise the temp. of 1 gram of water by 1 deg Celsius
38. Heat is transferred by what 3 methods?
• Convectional
• Conduction
39. What is a cryogen?
Extremely cold liquid
40. Liquid nitrogen boils at?
77K
41. Helium boils at ?
4 K
42. "Standard Units of Measurement" issued by who and when?
ICRU / 1981
43. 1 (R) is equivalent to ___ ion pairs in one __ __ of air?
2.08 x 10^9 .... cubic centimeter
44. C/kg^3 =
=
=
Coulombs/Kilogram

1 R

2.58 x 10^-4
46. Gy stand for?
Gray (SI Unit)
47. How many RADs in 1 Gray?
100.... 100 RAD = 1 Gray
48. Relationship between "rem" and "sV"
100rem = 1 sV
49. Relationship between "Ci" and "Bq"?
• Bq = Bequerel (SI)
• 1 Ci = 3.7 x 10^10 Bq