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55 Cards in this Set
- Front
- Back
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a factor that does not change in the experiment
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constant
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a factor changed by the experimenter
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independent variable
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a factor changed when the independent variable changes
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dependent variable
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a group unaffected by the experiment used to compare the test results
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control
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density equation
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d=m/v
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the ________ variable is on the x axis & the _______ variable is on the y axis
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independent; dependent
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speed equation
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s=d/t
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acceleration equation
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a=(vfinal-vinitial)/t
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what is the value for g, the acceleration due to gravity?
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9.8m/s*2
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f=ma
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2nd law
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gravity depends on the masses of the objects & the distances between them
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law of universal gravitaion
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an object in motion stays in motion; law of interia
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1st law
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for every action, there is an equal & opposite reaction
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3rd law
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momentum equation
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p=mv
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2 main types of energy?
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kinetic & potential
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kinetic energy equation
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k=1/2mv*2
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equation for gravitational potential energy?
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PEg=mgh
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the initial amount of energy must equal the final amount of energy in a system
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law of conservation of energy
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work equation
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w=fd
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power equation
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p=w/t
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bar that is free to pivot or turn around on a fixed point
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lever
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grooved wheel with a rope, running along the grove
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pulley
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shaft that is attached to the center of a larger wheel so they rotate
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wheel & axle
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inclined plane wrapped in a spiral around a cylindrical post
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screw
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sloping surface that reduces the amount of force
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inclined plane
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inclined plane with 1 or 2 sloping sides
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wedge
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how are conductors & insulators different?
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conductors allow movement, insulators prevent it
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ohms law equation
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i=v/r, v=ir
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example of a medium
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liquid
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matter that waves travel through
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medium
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waves that have to travel thru matter
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mechanical waves
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matter in the medium moves perpendicular from the direction the wave is traveling
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transverse waves
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example of an electromagnetic wave
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visible light
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waves that do not have to travel through matter
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electromagnetic waves
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matter in the medium moves parallel to the direction the wave is traveling
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compressional waves
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example of compressional wave
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sound wave
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when light passes thru an object
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transmit
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what is viscosity?
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resistance of flow
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boyle's equation
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P1V1=p2*v2
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charles' equation
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v/t=v2/t2
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boyles law:
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as 1 variable goes up, the other goes down
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charles' law
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as one variable goes up, the other goes down
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atoms of the same element that have different # of neutrons
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isotopes
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process of splitting a nucleus into several smaller nuclei
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fission
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process of fusing together 2 nuclei w/ low masses
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fusion
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3 types of radiation:
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alpha, beta, gamma
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amount of time it takes for half the nuclei in a sample to decay
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half-life
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metals + nonmetals bonding
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ionic bonding
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nonmetal + nonmetal
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covalent bonding
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metals bonding with each other
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metalloid
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what are 2 products of a neutralization reaction?
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water & salt
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pressure equation
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p=f/a
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the only state of matter that is not a fluid
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solid
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atoms of the same element are exactly alike
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daltons theory
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what is the charge of an electron
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+1
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