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73 Cards in this Set

  • Front
  • Back
mass number
mass of protons, neutrons, electrons
isotopes
same number of protons , different number of neutrons
familes
columns
period
horizontal rows
valence electrons
outer electrons
phase changes
bonds between particles being broken of formed, energy do not go into temperature change
friction
force in direction opposite motion of object
newtons 2nd law
force = mass times acceleration
gravitational constant
9.8 m/sec times sec
momentum
mass times velocity
force
push or a pull
inertia
a property of matter that resists change in motion, body at rest remains at rest and a body in motion tends to stay in motion in a straight line
gravity
the force of attraction between any two bodies in the universe
sliding friction uses what
lubricants
mass
represents the amount of matter
weight
is the pull of gravity on a mass
air resistance
depends on surface area and velocity as air pressures , increases depth decreases and as air press decreases, depth increases
force of gravity depends on what
the mass
terminal velocity occurs?
when air resistance equals gravitational pull
types of levers
1st, 2nd, 3rd
1st class
fulcrum, between effort and resistance
2nd class
resistance between fulcrum and effort
3rd class
clas effort between fulcrum and resistance
bernoullis principle
pressure of moving fluid less hen surrounding fluid, higher speed over curved surface, lower pressure , unbalanced forces causing to lift
C----F
C x 9/5 + 32 = F
F ----C
(f-32) x 5/9 = C
C ----k
C + 273 = K
k ----C
K-273 = C
potential energy
PE = M x G x H
mass times gravitational constant times height in meter
kinetic energy
KE= 1/2 x M x V2
one half times mass times velocity squared
Formulas
accel = Vf- Vi/t
S= d/t
d=sxt
Vf = ( accl x t) + Vi
Vi = vf -( accel x t)
t=d/s
effort force
amount of work you obtain from a machine
fulcrum
pivot point for a lever
Joule =
newton x meter
watt
joule/second
power
work/time
types of energy
mechanical, heat, chemical,electromagnetic, and nuclear
simple machines
gear, lever, inclined plane, pulley, screw, wheel and axle
to find pressure you must know?
force and area
one reason air pressure increases at lower altitudes is because?
there are more air particles in a given area
the brake system on a car is an example of a
hydraulic device
pressure is force divided by
area
dure to force of ? the pressure of a fluid increases as depth increases
gravity
at higher altitudes there are
fewer particles of air
fluid pressure increases as
depth increases
Buoyancy
he force of a fluid that pushes an object up
efficiency
compares the output work to the input work... expressed in percent
Abutmants
The struture that carries the load of an arch bridge
Arch Bridge
This bridge has great natural shape and is very strong
Beam Bridge
This bridge can withstand the effects of thermal expansion.
Bending
Truss Bridges cannot hadel this force.
Cable Stayed Bridge
A type of suspension bridge
Suspension Bridge
This bridge can span longer then any other type of bridge and this bridge is suseptable to torsion
Compression
This force travels downwards through the towers of a suspension bridge.
Decking
this part of a suspension brige is supported by suspenders and cables.
Forces on the bridge
Tension and compression
Tension
Upward force acting upon bridges
Triangle
strongest shape for supporting a bridge
Span
The distance a bridge expands between 2 supports
Torsion
bending or twisting
Abutmants
The struture that carries the load of an arch bridge
Arch Bridge
This bridge has great natural shape and is very strong
Beam Bridge
This bridge can withstand the effects of thermal expansion.
Bending
Truss Bridges cannot hadel this force.
Cable Stayed Bridge
A type of suspension bridge
Suspension Bridge
This bridge can span longer then any other type of bridge and this bridge is suseptable to torsion
Compression
This force travels downwards through the towers of a suspension bridge.
Decking
this part of a suspension brige is supported by suspenders and cables.
Forces on the bridge
Tension and compression
Tension
Upward force acting upon bridges
Triangle
strongest shape for supporting a bridge
Span
The distance a bridge expands between 2 supports
Torsion
bending or twisting