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49 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Current (I)
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amp
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Resistance (R)
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ohms
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Voltage (V)
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volts
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Power (P)
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watts or kilowatt
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Energy (E)
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kilowatt-hour
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science
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method for studying the natural world
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technology
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used to help people
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physics
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the science of matter and energy and their interactions
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matter and energy
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chemistry
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the branch of the natural sciences dealing with the composition of substances and their properties and reactions
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kilo-
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1000
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centi-
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100
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milli-
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1,000,000
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data
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information
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variable
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factor that can cause a change in the reults of an experiment
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control
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standard used fro comparison of test results in an experiment
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hypthesis
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educated guess using what you know and what you observe
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experimentation
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orgranized procedure for testing a hypothesis
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speed
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distance an object travels per unit of time. s=d/t
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distance/?
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velocity
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the speed and direction of moving object. v=d/t
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acceleration
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rate of change of velocity; can be calcuated by dividing the change in the velocity by time it takes the change to occur.
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rate of ?
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force
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a push or a pull on an object. V-Vf-Vi/t
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momentum
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property of moving object that equals that equals its mass times its velocity. P=mv
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=m*v
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freefall
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free of gravity
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mass
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kilogram (kg) balance
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length
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meter (m) ruler
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temperature
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Kelvin (K) thermomater
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not definitions; unit
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volume (solid)
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length*width*height
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volume (liquid)
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measure with cylinder, follow meniscus
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Newton's first law of Motion
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any object moving at a constant velocity keeps moving at that velocity unless an unbalaced net force acts on it.
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think constant velocity
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Newton's 2nd Law
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the accleration of an object is in the same direction as the net force on the object
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think acceleration of object
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static friction
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the frictional force that prevents two surfaces from sliding past each other.
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sliding friction
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the force that opposes the motion of 2 surfaces from sliding past each other
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rolling friction
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the frictional force between a rolling object and the surface it rolls on
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air resistance
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opposes the motion of objec that move through the air
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gravity
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an attractive force between any two objects that depends on the masses of the objects and the distance between them.
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terminal velocity
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e downward force of gravity that causes the object to accelerate
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downward force
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Newton's 3rd law
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when one object exerts a force on a second object, the second one exerts a foce on the first that is equal in strength and opposite in direction.
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weight
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the gravitational force exerted on an object
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chemical potential energy
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energy stored in chemical bonds
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elastic potential energy
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energy stored by something that can stretch or ocmpress
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kinetic energy
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the energya moving object has because of its motion. (KE 1/2 mv2)
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think motion
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gravitational potential energy
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energy stored by objects due to their position above Earth;s surface. (PE= mgh)
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Law of conservation of momentum
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the momomentum of an object doesn't change unless its mass, veocity, or both change,
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law of conservation of energy
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that energy cannot be created or destroyed.
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termperature
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an object is a measure of the average kinectic energy of the particles in the object. (temperature increases, speed increases and move farther apart.)
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average of..?
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heat
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thermal energy that flows from something at a higher temperature to something at a lower temperature.
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higher to lower
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conduction
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the trasfer of thermal energy by collisions between particles in matter
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convection
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transfer of thermal energy in a fluid by the movement of warmer and coolr fluid from place to place.
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radiation
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the transfer of energy by electromagnetic waves
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