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PHY115 – Sault College – Bazlurslide 1 SI Prefix Conversions

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PHY115 – Sault College – Bazlurslide 2 Prefixes for SI Units http://en.wikipedia.org/wiki/SI_prefix

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PHY115 – Sault College – Bazlurslide 3 SI Units

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PHY115 – Sault College – Bazlurslide 4 c → no prefix Without unit: 25 c = ? From the Prefix chart: 10 -2 is c 10 0 is no prefix So, they differ by (-2 – (0)) = -2-0 = -2 powers of 10 The power -2 is a negative number. Also c is smaller prefix than no prefix, the result will be a smaller number, so move decimal point to the left 2 digits: 25. c = 0.25 no prefix

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PHY115 – Sault College – Bazlurslide 5 c → no prefix Add unit: 25 cg = ? g From the Prefix chart: 10 -2 is c 10 0 is no prefix So, they differ by (-2 – (0)) = -2-0 = -2 powers of 10 The power -2 is a negative number. Also c is smaller prefix than no prefix, the result will be a smaller number, so move decimal point to the left 2 digits: 25. cg = 0.25 g

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PHY115 – Sault College – Bazlurslide 6 k → no prefix Without unit: 25 k = ? From the Prefix chart: 10 3 is k 10 0 is no prefix So, they differ by (3 – (0)) = 3-0 = 3 powers of 10 The power 3 is a positive number. Also c is smaller prefix than no prefix, the result will be a smaller number, so move decimal point to the right 3 digits: 25. k = 25000.

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PHY115 – Sault College – Bazlurslide 7 k → no prefix Add unit: 25 kg = ? g From the Prefix chart: 10 3 is k 10 0 is no prefix So, they differ by (3 – (0)) = 3-0 = 3 powers of 10 The power 3 is a positive number. Also c is smaller prefix than no prefix, the result will be a smaller number, so move decimal point to the right 3 digits: 25. kg = 25000. g

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PHY115 – Sault College – Bazlurslide 8 da → c Without unit: 5 da = ? c From the Prefix chart: 10 2 is da 10 -2 is c So, they differ by (2 – (-2)) = 2+2 = 4 powers of 10 The power 4 is a positive number. Also c is smaller prefix than da, the result will be a bigger number, so move decimal point to the right 4 digits: 5. da = 50000. c

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PHY115 – Sault College – Bazlurslide 9 da → c Add unit: 5 dag = ? cg From the Prefix chart: 10 2 is da 10 -2 is c So, they differ by (2 – (-2)) = 2+2 = 4 powers of 10 The power 4 is a positive number. Also c is smaller prefix than da, the result will be a bigger number, so move decimal point to the right 4 digits: 5. dag = 50000. cg

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PHY115 – Sault College – Bazlurslide 10 c → da Without unit: 25 c = ? da From the Prefix chart: 10 -2 is c 10 2 is da So, they differ by (-2 – (2)) = -2-2 = -4 powers of 10 The power -4 is a negative number. Also da is bigger prefix than c, the result will be a smaller number, so move decimal point to the left 4 digits: 25. c = 0.0025 da

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PHY115 – Sault College – Bazlurslide 11 c → da Add unit: 25 cg = ? dag From the Prefix chart: 10 -2 is c 10 2 is da So, they differ by (-2 – (2)) = -2-2 = -4 powers of 10 The power -4 is a negative number. Also da is bigger prefix than c, the result will be a smaller number, so move decimal point to the left 4 digits: 25. cg = 0.0025 dag

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