Physics- Ch .1

7 Fundamental Base Units

7 Fundamental Base Units

kg, m, s, candella, amp, kelvin, mole

Derived Unit

combination of base units

kg

man-made object (cylinder) in France

m

the distance that light travels in a vacuum in a certain amount of time (1/3 x 10E8 seconds)

s

the time it takes for a Cs-133 atom to vibrate a certain number of times

Theory

explains

Law

describes

Accuracy

need a target

Precision

if numbers are close together

Percent error

absolute value: observed # - target/target x 100

5% Rule Test

absolute value: b value from computer/max y value from table x 100

\#<=5% set equal to 0

\#>5% keep b from computer