CHM 1040 Lecture Notes - Lecture 2: Decimal Mark, Trailing Zero, Scientific Notation
17 Sep 2016
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Time is the most crucial thing that we have in society. In the olden days, the body was used to make measurements. Scientific notation: used when a number is too big or too small to write out. A digit that must be estimated is called uncertain. Ex: pin at 2. 85 cm; certain- 2. 8; uncertain- 5. Ex: 16. 07 4 sf c. ) trailing zeros are significant only if there is a decimal point. Exact numbers unlimited amount of significant figures. For multiplication and division, the number of significant figures in the result is the same as the smallest number of significant figures used in the problem. For addition and subtraction, the limiting term is one with the smallest number of decimal places. Ex: 23. 445 + 7. 83 = 2 places after the decimal. 0 degrees c is the same as 273 k. *in order to find k with only given f, you have to convert f to c first, then c to k.
