
What are derived units?
 Units that combine several fundamental units to derive their unity
 example: area= length x length

In the lab, what do we measure the volume of a solid, liquid, and gas, as?
 solid: cm^{3}
 liquid: mL
 gas: L

Why is the volume of a gas measured with its measurement and not that of the liquid?
 It deals with the density of water
 1 mL= 1 cm^{3}
 Water is more dense at 3.98^{o}C as a liquid. As you get away from the liquid state, the density decreases, making water lighter
 Because gas is not very dense, it is measured in g/L

Each cubic meter contains __ cubic decimeters, which contain __ cubic centimeters.

What is accuracy?
how close to a true value a given measurement is

What is precision?
 how well a number of independent measurements agree with each other
  How well can you repeat/ receive the same value?

What is standard deviation
 amount of precision
 the higher it is, the less precise your answer

What should we pay attention to when doing measurements?
significant figures

Does it matter what we measure with?
Yes



density
mass per unit volume

speed
distance per unit time

acceleration
change in speed per unit time

force
mass x acceleration

pressure
force per unit area


