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76 Cards in this Set

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what are the two main measuring systems?
english and metric
___cm=1 meter
100cm
___m= i kilometer
1000m
___cm=1 inch
2.54
___mi= 1 kilometer
.62 miles
velocity
speed in a given direction
acceleration
the rate at which an object changes position
a sparrow accelerates at 4 mps2 this means that each second the sparrows velocity changes by how much?
4meters
What does it mean when the acceleration of an object is negative?
That the object is moving backwards.
volume
a measure of how much space an object takes up
___ml= 1 liter
1000
mass
amount of matter in an object
will the mass of an object change if it is moved from the earth to the moon?
no, only the weight
Gram
mass of 1 cubic centimeter of water at 4 degrees celcius
___g= 1 kilogram
1000 grams
force
push or pull of an object
english unit of force
pound, lb
metric unit of force
newton, n
__n=1 pound
4.5 newtons
all objects at rest have________forces acting on them
balanced
All objects at a constant velocity have ____ forces acting on them
balanced
All accelerating objects have ______ forces acting on them
unbalanced
Newtons 1st law
an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force
newtons 2nd law
f-ma
newtons 3rd law
every action has an equal and opposite reaction
value of g on earth
9.8 meters per second2
double mass= __________force due to gravity
double
Calculating work
w=f x a
metric unit to measure work
newtons
english unit to measure work
foor pounds
power
rate at which work is done
power in metric
joules per second
power in english
foot pounds per second
1 hp=_____ ft.lbs/sec
550ft.lbs/sec
energy
ability to do work
energy in greek
work within
energy measure in
joules
kinetic energy
energy due to an objects motion
law of conservation of energy
energy can neither be created nor destroyed
law of conservation of energy exception
nuclear energy
waves
a traveling disturbance that carries energy
transverse wave
a wave at which the medium moves perpindicular to the waves direction
transverse wave measured by
amplitude and wavelength
more energy, high or low amplitude wave
high
more energy, short or long wavelength wave
short
longitudinal wave
a wave in which the medium travels back and forth with the wave
sound is caused by...
caused by vibrating matter
frequency measures...
how often waves pass by
one hertz=
one per second
high pitch sound is high or low frequency
high frequency
high pitch long or short wavelength
short wavelength
speed of sound
750 miles per hour
how long does it take sound to travel one mile?
5 seconds
atom
a tiny particle made up of protons neutrons and electrons with one nucleus
protons charge
positive one
protons location
in the nucleus
neutrons charge
neutral
neutrons position
in the nucleus
electrons charge
negative 1
electrons location
in specific orbitals surrounding the nucleus
how much larger is a proton than a electron?
1836 times
what 2 particles can be added together to make another particle
proton+electron= neutron
atomic number
# of protons in an atom
Mass number
mass of an individual atom
isotope
atoms of an element containing a specific number of neutrons
aluminum=symbol, atomic #, # protons, # neutrons, # electrons, mass #, isotope symbol
al, 13,13,14,13,27, al-27
list eight orbitals in the order that they fill
1s,2s,2p,3s,3p,4s,3d,4p
valence shell
outermost shell of an atom
list 7 types of electromagnetic radiation
radio, microwave, infrared, visible, uv, xrays, gamma
list 7 colors
roygbiv
red orange yellow green blue indigo violet
speed of light
186,000 mi/sec
refraction
bending of light as it travels from one medium to another
ac and dc
alternating current and direct current
alternating can go more than one way, direct follows one specific path
big bang
how the earth was created 13.7 billion years ago
half life
the amount of time that it takes for half of the atoms of a substance to decay
supernova
when iron forms, the star collapses then explodes