CHEM 1100 Chapter Notes - Chapter 2: Si Derived Unit, Conversion Of Units, Problem Solving
26 Feb 2014
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Measurement: scientists must be curious and ask why? , they must make observations on some aspect of nature, devise laws from those observations and create a theory to give insight into reality. Tools needed for this procedure revolve around measurement. Each digit in a reported quantity is taken to be certain, except for the last, which is estimated: when using measured quantities in calculations, must be careful to preserve the certainty associated with the measure quantities. Scientific notation: a number written in scientific notation has 2 parts: a decimal part, a number between 1. &10; a and an exponential part, 10 raised to the exponent, n. Decimal part exponential part: meaning of n in the exponent: Positive n = multiply by 10 n times. Negative n = divide by 10 n times: positive n: 102 = 1 x 10 x 10 = 100. 103 = 1 x 10 x 10 x 10 = 1000: negative n:
