Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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
|
