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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Do non-zero integers always count as sigfigs?
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yes
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You should know this.
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Leading zeros and zeros that precede nonzero digits are not significant?
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no, they are not.
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You should know this.
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How many sigfigs does 0.0025 have?
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2
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See preceding card.
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Do captive zeros and zeros between digits count as sigfigs?
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yes
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How many sigfigs are in 1.008?
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4
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When are trailing zeros sigfigs?
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when the # contains a decimal point
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How man sigfigs does 100 have? How about 1.00 X 10^2?
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100 has only 1 sigfig whereas 1.00 has 3 sigfigs.
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How many sigfigs does 100. have?
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3 sigfigs; this is a trick question. The addition of the period after the 100 makes all figures sigfigs.
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The period following the 100 is not a typo.
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How many sigfigs are in 0.0105? And in 0.050080?
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3 in the first and 5 in the second; because the 0.0 are not trailing zeros, they are not sigfigs; same for second question.
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What do we know about leading zeros?
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How many sigfigs are in 8.050 X 10^-3?
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4 because there is a decimal which makes all trailing 0's sigfigs
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When (*) and (/), the number of sigfigs in the result is the same as the number in the least precise measurement used in the calculation.
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4.56
*1.4 <-- Limiting term ----- 6.38 --> 6.4 |
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For (+) and (-), the result has the same number of decimal places as the least precise measurement used int he calculation.
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12.11
18.0 <-- Limiting term + 1.013 ------- 31.123 ---> 31.1 |
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When doing calculations, carry extra digits through to final result.
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Do rounding at the end of the calculation.
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If digit to be removed is:
a) < 5, do what? b) > 5, then what? c) = to five, then? |
a) preceeding digit stays the same
b) preceeding digit +1 c) +1 if preceeding digit odd and stays the same if preceeding digit is odd |
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How do you convert from one unit to another?
Ex.: You want to order a bike with a 25.5-in. frame, but the sizes are given in cm only. What size should you order? |
2.54 in * 2.54 cm = 64.8 cm
---- 1in. * The in. cancel out and you are left with cm. |
* To do dimensional analysis (convert from 1 unit to another), use the equivalence statement that relates the 2 units
* Derive the appropriate unit factor by looking at the direction of the required change (to cancel unwanted units) * Mult. the qty. 2b converted by the unit factor to give the qty. with desired units |
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How do you convert from K to C?
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T(K) = T(C) + 273.15
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How do you convert from C to K?
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T(C) = T(K) - 273.15
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What is the formula to determine density?
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D = mass / volume
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holder
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holder
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holder
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holder
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What is the organization of matter?
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See image
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