Measurement - e kg/m 3 frequency cycles/time s-1 hertz (Hz)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Measurement quantitative observations include 3 pieces of information o magnitude o unit o uncertainty measurements are not numbers o numbers are obtained by counting or by definition; measurements are obtained by comparing an object with a standard "unit" o numbers are exact; measurements are inexact o mathematics is based on numbers; science is based on measurement The SI System Le Systéme Internationale (SI) is a set of units and notations that are standard in science. Four important SI base units (there are others Quantity SI Base Unit English Equivalent length meter (m) 1 m = 39.36 in kilogram (kg) 1 kg = 2.2 lbs second (s) temperature kelvin (K) °F = 1.8( +32 K = °C + 273.15 derived units are built from base units Some SI derived units Quantity Dimensions SI units Common name length × length m 2 square meter length/time m/s mass/volum
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: e kg/m 3 frequency cycles/time s-1 hertz (Hz) acceleration velocity/tim e m/s 2 mass acceleration kg m/s 2 Newton (N) force distance kg m 2 /s 2 Joule (J) Prefixes are used to adjust the size of base units Commonly used SI prefixes (there are others Meaning Abbreviati on Exponenti al Notation billion G 10 9 million M 10 6 thousand k 10 3 hundredths of c 10-2 thousandth s of m 10-3 millionths of 10-6 billionths of n 10-9 trillionths of p 10-12 several non-SI units are encountered in chemistry Unit type SI conversion Notes volume 1 L = 1000 cm 3 1 quart = 0.946 L Angstrom length 1 = 10-10 m typical radius of an atom mass unit mass 1 u = 1.6605410-27 kg about the mass of a proton or neutron; also known as a 'dalton' or 'amu'...
View Full Document

Page1 / 2

Measurement - e kg/m 3 frequency cycles/time s-1 hertz (Hz)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online