Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length –...
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Transcript of Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length –...
![Page 1: Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length – Meter ( 1/299,792,458 distance light travels in a vacuum.](https://reader036.fdocuments.in/reader036/viewer/2022082610/56649f505503460f94c729b2/html5/thumbnails/1.jpg)
Units and Significant Digits
![Page 2: Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length – Meter ( 1/299,792,458 distance light travels in a vacuum.](https://reader036.fdocuments.in/reader036/viewer/2022082610/56649f505503460f94c729b2/html5/thumbnails/2.jpg)
Standards of Length, Mass and Time
MKS System (SI units)• Length – Meter ( 1/299,792,458 distance light
travels in a vacuum in one second• Mass – Kilogram (Mass of the International
Prototype Kilogram, a/k/a “Le Grande K”)• Time – Second (9,192,631,770 periods of the
radiation from cesium-133)
![Page 3: Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length – Meter ( 1/299,792,458 distance light travels in a vacuum.](https://reader036.fdocuments.in/reader036/viewer/2022082610/56649f505503460f94c729b2/html5/thumbnails/3.jpg)
Prefixes for SI
10-24 yocto
10-21 zepto
10-18 atto
10-15 femto
10-12 pico
10-9 nano
10-6 micro
10-3 milli
10-2 centi
10-1 deci
1024 yotta
1021 zetta
1018 exa
1015 peta
1012 tera
109 giga
106 mega
103 kilo
102 hecto
101 deka
![Page 4: Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length – Meter ( 1/299,792,458 distance light travels in a vacuum.](https://reader036.fdocuments.in/reader036/viewer/2022082610/56649f505503460f94c729b2/html5/thumbnails/4.jpg)
Significant DigitsSignificant Figures (Sig Figs)
123.4 Four Significant Digits
0.0012 Two Significant Digits
1,500 ? Significant Digits
1.50 x 103 Three Significant Digits
![Page 5: Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length – Meter ( 1/299,792,458 distance light travels in a vacuum.](https://reader036.fdocuments.in/reader036/viewer/2022082610/56649f505503460f94c729b2/html5/thumbnails/5.jpg)
Adding/Subtracting
123.4 + 456 = 579
123.4 + 4.56 x 106 = 4.56 x 106
Only significant to the limit of any single term
![Page 6: Units and Significant Digits. Standards of Length, Mass and Time MKS System (SI units) Length – Meter ( 1/299,792,458 distance light travels in a vacuum.](https://reader036.fdocuments.in/reader036/viewer/2022082610/56649f505503460f94c729b2/html5/thumbnails/6.jpg)
Multiplying/Dividing
123.4 x 456 = 5.63 x 104
Only significant to the smallest number of significant digits in any single term