Units of Measurement

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Units of Measurment

Four Rules of Significant figures are...1) All non-zero numbers (1,2,3,4,5,6,7,8,9) are always significant.2) All zeroes between non-zero numbers are ALWAYS significant.3) All zeroes which are to the right of the decimal point and at the end of the number are always significant.4) All zeroes which are to the left of a written decimal point and are in a number are ALWAYS significant.

The seven SI base units, which comprise:The ampere (A) - unit of measurement of electric currentThe kilogram (kg) - unit of measurement of massThe metre (m) - unit of measurement of lengthThe second (s) - unit of measurement of timeThe kelvin (K) - unit of measurement of thermodynamic temperatureThe mole (mol) - unit of measurement of amount of substanceThe candela (cd) - unit of measurement of luminous intensit

Scientific Notation helps us make big numbers into smaller numbers. It's a mathematical expression. It's used by multiplying a number by 10 to the appropriate power. E.X. 1.386 × 10 to the power of 3.

Scientific Notation

Accuracy is the state of being precise or exact about something. E.X. The battery percentage on devices show the accurate battery percent there is on that device.Precision is another word for accuracy. It also means the state/condition of being exact or accurate.They are both important because sometimes for you to know something, you are going to have to find the exact number of it. E.X. When you travel by plane, you'd have to know the exact number of gasoline so the plane won't stop in mid air.

Accuracy and Precision

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Rules of Significant Figures


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