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23 Cards in this Set

  • Front
  • Back
lever
Le/Lr
fixed pulley
alwayssssss 1
moved pulley
# of ropes
wheel and axle
r of big wheel
_______________
r of smaller wheel
gears
teeth of big wheel
________________
teeth of small wheel
screw
how close threads are
wedge
l
__
h
hydrualic press
r of bigger piston
_________________
r of smaller piston
inclined plane
l
___
h
machines change
direction and/or force
Fr=
what machine does
((resistance force))
Fe=
force that you apply to the machine
((effort force))
Work input=
Fe x De
Work output
Fr x Dr
ma=
Fr/Fe
efficiency=
work coming out
_____________
work coming in
power
w
__
t ((((((Watttttts))))
4 states of matter
solid liquid gas plasma
1)all matter is made of particles that are in constant motion
2) speed and arangement determines state of matter
kenetic theory
amorphous solids
without crystals
thermal expansion
most matter expands when heated, molecules move faster, contract when cooled
Hf ((heat of fusion))
to heat, you add a gram of solid to make it melt
Hv((heat of evaporation))
heat, you add to water to boil