Nt1310 Unit 3 Maths
Units of Measurement: Sections 1.4-1.5
Physical Quality Name of Unit Abbreviation
Mass Kilogram Kg
Length Meter m
Time Second sª (Sec)
Temperature Kelvin K
Amount of Substance Mole mol
• Système International d’Unitès (used in the science community world wide)
• Uses different base unit for quantity
Velocity m/s (two base units build velocity = derived unit) {g/sec, kg/min}
Metric System
Prefix Abbreviation Meaning
Mega M 106
Kilo k 103
Centi c 10-2
Milli m 10-3
Micro µ 10-6
Nano n 10-9
Pico p 10-12
Volume
Most common used metric u nits for volume: Liter (L), milliliter (mL),
1dm3 = 1L A liter is a cube 1 dm long on each side
1cm3 = 1mL …show more content…
#’s 100 1746 2201 6.250 0.009340 90301 0.0902 130.059 50 160
Sig. Fig 1 4 4 4 4 5 3 6 1 2
When addition or subtraction is performed, answers are rounded to the least significant decimal place.
20.4 (1) 16.964 (4)
- 1.322 (3) - 8.0693
__________ ___________ 19.122 8.8953 19.1 8.895
When multiplication and division is performed answers are rounded to the number of digits that corresponds to the least number of sig. figs in any of the numbers used in the calculation.
6.221 (4) 8.98765 (6) 12.64 (4) x 5.2 (2) x 6.1 (2) x 10 (1)
_________ ___________ _________ 32.3492 54.824665 126.40 32 55 100
Accuracy vs. Precision
Accuracy I show close you are to an expected result
Precision is how often you repeat the same results
Exponential
Physical Quality Name of Unit Abbreviation
Mass Kilogram Kg
Length Meter m
Time Second sª (Sec)
Temperature Kelvin K
Amount of Substance Mole mol
• Système International d’Unitès (used in the science community world wide)
• Uses different base unit for quantity
Velocity m/s (two base units build velocity = derived unit) {g/sec, kg/min}
Metric System
Prefix Abbreviation Meaning
Mega M 106
Kilo k 103
Centi c 10-2
Milli m 10-3
Micro µ 10-6
Nano n 10-9
Pico p 10-12
Volume
Most common used metric u nits for volume: Liter (L), milliliter (mL),
1dm3 = 1L A liter is a cube 1 dm long on each side
1cm3 = 1mL …show more content…
#’s 100 1746 2201 6.250 0.009340 90301 0.0902 130.059 50 160
Sig. Fig 1 4 4 4 4 5 3 6 1 2
When addition or subtraction is performed, answers are rounded to the least significant decimal place.
20.4 (1) 16.964 (4)
- 1.322 (3) - 8.0693
__________ ___________ 19.122 8.8953 19.1 8.895
When multiplication and division is performed answers are rounded to the number of digits that corresponds to the least number of sig. figs in any of the numbers used in the calculation.
6.221 (4) 8.98765 (6) 12.64 (4) x 5.2 (2) x 6.1 (2) x 10 (1)
_________ ___________ _________ 32.3492 54.824665 126.40 32 55 100
Accuracy vs. Precision
Accuracy I show close you are to an expected result
Precision is how often you repeat the same results
Exponential