Physics Flashcards
(32 cards)
name all energy stores
magnetic internal (thermal) chemical kinetic electrostatic elastic potential gravitational potential nuclear
equation for kinetic energy
1/2 m x v squared
equation for elastic potential energy
1/2 k x e squared
(N/m) (m)
equation for gravitational potential energy
m x g x h
equation for work done
work done = f x d
eqation for power
power = work done/time
efficiency equation
useful energy/total energy
specific heat capacity equation
change in thermal energy = mass x specific heat capacity x temperature change
fossil fuels: renweable or non-renewable?
non-renewable
equation for charge
charge = current x time
potential difference equation (energy)
V = E/Q
potential difference equation
V = I X R
will current stay the same in series circuits?
yes
is potential difference the same in parallel circuits?
no, they are shared
equation for density
density = mass/volume (kg/m cubed)
when solid turns straight to a gas:
sublimation
change in thermal energy (latent heat)
change in thermal energy = mass x latent heat
equation for pressure:
pressure = force/area
JJ thompson’s model
plum pudding
vacuum…
volume of no space
rutherford discovered…
nuclear atom
atom contains..
protons and neutrons with electrons orbiting in shells
proton, neutron and electron charges and masses
proton- 1, 1
neutron- 1,0
electron-1/2000, -1
what are isotopes?
atoms of the same element with a different number of neutrons
