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