{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# phys - Chp.1-Measurements Standard 1 Length-the distance...

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

Chp.1-Measurements Standard 1. Length-the distance between two points, we use the meter as a standard. a. 1 meter(m)=the distance light travels in a vacuum in 1/299,792,458 seconds. 2. Time-defined by a repetitive motion of an object. a. 1 second(s)=9,192,631,770 vibrations of radiation from a cescium-137 atom 3. Mass-for now,its like weight a. 1 Kilogram(kg)=the mass of a specific cylinder kept in France The powers of Ten Prefix Power Abbreviations Nano 10E-9 n Micro 10E-6 m(mu) Milli 10E-3 m Centi 10E-2 C Kilo 10E3 K Mega 10E6 M Giga 10E9 G Examples: 1Millimeter=1mm,10E-3m 1Kilogram=1kg,10E3g -The quantities length, mass and time are called fundamental quantities. -Other quantities are called derived Examples: Area= 1m[ square ] 1m Area= 1m^2 Volume= 1m x 1m x 1m V=1m^3 4. Density-mass per unit volume a. D=m/V units of kg/m^3 5. Speed-is distance over time speed has units m/s a. Speed is denoted by V,Distance by X, Time by t. V=X/t Dimensional Analysis- Shorthand for analysis of units.

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}