weaknesses Flashcards
what is a scalar quantity
only magnitude
how to calculate resultant vector
pythagoras
3 examples of scalar quantities
distance mass energy
3 examples of vector quantities
displacement velocity acceleration
what is impulse
change in momentum
if there’s two springs in a series what happens to the spring constant
it halves
what happens to particles when there’s a change of state
-gaining potential energy
-kinetic energy constant
boyles law
pressure is inversely proportional to volume
charles law
volume is proportional to temperature
pressure law
pressure is proportional to temperature
kinetic theory of gases
Rapid and random motion of particles
Attraction - there are no attractive forces between particles
Volume of particles is negligible
Elastic collisions
Duration of collisions is negligible
variables
dependant = measure
control = same
independent = change
what to do when uncertainties are added or taken away
add the absolute uncertainties together
what to do when uncertainties are divided or multiplied
add them together
what to do when uncertainties are raised to a power
bring power down and times it by the uncertainty in the value to get the percentage uncertainty
what happens to constants when calculating uncertainty
they get ignored
how to find uncertainty in a mean
half the range
what happens when a substance is heated but remains in the same state
-kinetic energy increases
-potential energy remains the same
what happens when a substance changes state
-potential energy increases
-kinetic energy stays the same
how can number of particles in a substance be determined
multiply number of moles by avogrado’s constant
brittle
material doesn’t bend, it instead tends to snap
