1. PHYSICS 11
TODAY:
The Imperial vs. Metric System

2. 1.2 Measurements in Physics
Pages:

3. There are two types of measurements use
Pages:

4. The units on the following pictures are the IMPERIAL units.
Does anybody knows them?
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5. What unit of measurement is this?
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6. Gallon

7. What unit of measurement is this?
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8. Mph (Miles per hour)
Gallon

9. What unit of measurement do we see here?
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Copyright © 2010 Ryan P. Murphy

10. Mph (Miles per hour)
Gallon
Pounds

11. What unit of measurement is used here?
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12. Mph (Miles per hour)
Gallon
Pounds
Inches

13. What unit of measurement is used here?
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14. Mph (Miles per hour)
Gallon
Pounds
Inches
Yards

15. What units of measurement do we see here?
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16. Mph (Miles per hour)
Gallon
Pounds
Inches
Yards
Fahrenheit

17. More than likely, we said the following things Gallon of milk.
65 miles per hour
Quarter Pounder
48 inches
Temperature in Fahrenheit
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18. The countries colored in red are the ones that use the imperial system.
Canada (sometimes)
The United States
Burma
Liberia
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19. The Imperial System Example
LENGTH

20. The IMPERIAL system is based on the following.
An inch represents the width of a thumb.

21. The yard is the distance from the tip of the nose to the end of the middle finger of the outstretched hand.

22. The foot (12 inches) was originally the length of a human foot, although it has evolved to be longer than most peoples feet.
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23. The mile is a Roman unit, originally defined to be the length of 2000 steps of a Roman legion.

24. The Metric system and SI UNITS
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25. I will show you these 6 pictures showing you their metric values.
Mph (Miles per hour)
Gallon
Pounds
Yards
Fahrenheit
Inches

26. One gallon of milk = 3.78 liters of milk.

27. 65 mph = 104 km/h Copyright © 2010 Ryan P. Murphy

28. double quarter pounder(0.5 pound) = 0.226 kg

29. 48 inches tall = 1.22 meters tall
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Copyright © 2010 Ryan P. Murphy

30. 1 Yards = meters
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31. 80 degrees Fahrenheit = 26.7 degrees Celsius
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32. The Metric system and SI UNITS
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33. The International System (System Internationale ‘unites) of Units (SI) also known as THE METRIC SYSTEM.
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34. It is used by scientists all over the world
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35. - One inch is usually divided into 8, 10 or 16 parts:
DIFFICULTY OF THE IMPERIAL UNITS
- One inch is usually divided into 8, 10 or 16 parts:

36. DIFFICULTY OF THE IMPERIAL UNITS
- One inch is usually divided into 8, 10 or 16 parts: This ruler has 16 divisions between inches

37. DIFFICULTY OF THE IMPERIAL UNITS
- One inch is usually divided into 8, 10 or 16 parts: This ruler has 16 divisions between inches - so the smallest unit here is 𝟏 𝟏𝟔 th of an inch What is the length of this pencil??

38. DIFFICULTY OF THE IMPERIAL UNITS
- One inch is usually divided into 8, 10 or 16 parts:
Yes, it is 𝟑 𝟕 𝟏𝟔 in
Measuring something involves fractions!!!
Isn’t that soooo awkward and time consuming?!

39. The simplicity of the metric system = only one unit of measurement for each type of quantity measured SI
For example:
One for length (meter)
One for mass (gram)
One for volume (liter)
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40. The measurements below are all the same.
“I am mm tall.”
“I am cm tall.”
“I am meters tall.”
“I am km tall.”
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41. You can measure the very small and the very large with the same unit
You can measure the very small and the very large with the same unit. (Meter)
1,000,000 kilometers and 1 millimeter.
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42. Compare it with Imperial System
For example:
One for length (meter)
One for mass (gram)
One for volume (liter) SI
Compare it with Imperial System
Imperial
For example:
Length: mile, yard, foot/feet, inch…
Mass: grain (≈0.65g), drachm (1.77 g), pound (453 g) etc…
Volume: ounce (0.028 L), gill (0.142 L), gallon (4.55 L)…
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43. SI UNITS
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44. The Metric (SI) System’s quantities
MASS

45. Mass: The amount of matter in an object.
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46. THE BASE UNIT = kilogram SYMBOL = kg

47. The Metric (SI) System’s quantities
TEMPERATURE

48. The degree of hotness or coldness of an object
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49. THE BASE UNIT = kelvin SYMBOL = K
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50. The Metric (SI) System
TIME
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51. Remember: Time is not the same everywhere
Remember: Time is not the same everywhere. Time speeds up and slows down. The faster you are going, the slower time travels.

52. THE BASE UNIT = second SYMBOL = s

53. AMOUNT OF SUBSTANCE The Metric (SI) System
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54. The mole: The molecular weight of a substance expressed in grams.
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55. THE BASE UNIT = mole SYMBOL = mol

56. ELECTRIC CURRENT The Metric (SI) System
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57. THE BASE UNIT = ampere SYMBOL = A
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58. LUMINOUS INTENSITY The Metric (SI) System
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59. THE BASE UNIT = candela SYMBOL = cd
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60. Is This elephant missing a leg or not??

61. The Metric System: A measurement system based on the powers of ten.
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62. POWERS OF TEN HAVE PREFIXES
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63. On the very last page in your textbook!!
YOU MUST KNOW THEM!!!
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64. If a woman has a mass of 60 000 000 mg, what is her mass in grams and kilograms?