{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chapter1

chapter1 - 1.3 Units of Measurement measurements consist of...

This preview shows pages 1–3. Sign up to view the full content.

1.3 Units of Measurement · measurements: consist of a number and a scale · SI system: internationally accepted system of measurement 1 dm 3 = (10cm) 3 = 1 L 1 cm 3 = 1 mL mass: measure of an objects resistance to a change in its state of motion F = m * a F= weight (force) m= mass a= acceleration due to gravity micro nano (u) (n) .000001 .0000001 mega kilo hecto (M) (K) (h) (da) 100,000 1,000 100 10 10 6 10 3 10 2 deka base deci centi milli unit (d) (c) (m) 1 .1 .01 .001 10' 10 0 10 -1 10 -2 10 -3 10 -6 10 -9 1.4 Uncertainty in Measurement measurement always has some degree of uncertainty (depends on the precision of the measuring device) · significant figures: certain digits and the first uncertain digit in a measurement (uncertainty in last digit is assumed to be + 1) Example: 25 mL 25 +- 1 mL measurement between 24 & 26 mL 25.00 25.00 +- 0.01 mL measurement between 24.99 and 25.01 mL

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2. Leading zeros aren't significant 3. Captive. .. significant 4. Trailing zeros (w/o decimal point) not significant
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 3

chapter1 - 1.3 Units of Measurement measurements consist of...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online