general test tips Flashcards
1
Q
what is a way to find percentage uncertainty from a graph
A
- draw a worst line of best fit
- determine its gradient
- compare to true value
- calculate uncertainty
2
Q
what to ALWAYS watch for when using masses vs forces and work done
A
w = f = mg
so w = fx = mgx
NOT mx
3
Q
what to ALWAYS include when doing particles
A
ATOMIC NUMBER AND MASS NUMBER next to the symbol
4
Q
what to ALWAYS include when writing about electric fields
A
per unit POSITIVE charge
