PHYS+221+Boardwork

Physical Quantity a number used to describe a physical phenomenon 

Operational Denifition - definition of how we would measure a physical quantity.

Practices - i) Convert 5 kg/yr to mg/s

Dimensional Consistency - The idea that a formula will have equivalent units on both sides of the equation. Also when we add or subtract we can only do those operations meaningfully for the same physical quantity.

Practices- ii) Prove the dimensional consistency of F=ma, W=Fd, and p=mv

Uncertainty, Error and Significant Figures - A good start for error is to consider what the tool. You are using this as the 'a priori' error (instrument error)