# Shared Flashcard Set

## Details

Physics Chapters 1-2 Test
Vocab words for the test on the first two chapters.
42
Physics
10/04/2009

Term
Definition
 errors made due to the limited ability to read a measuring instrument
Term
 random errors
Definition
 errors that can be due to reading errors, carelessness, or unavoidable changes made in doing repeated measurements
Term
 systematic errors
Definition
 errors associated with particular measuring instruments or bias on the part of the observer, measurements usually spread about a value rather than being about the true/accepted value
Term
 physics
Definition
 the study of matter and energy and how it explains the origin and transformation of the universe
Term
 matter
Definition
 anything that has mass
Term
 (gravitational) mass
Definition
 the amount of material in an object
Term
 inertia
Definition
 a property of matter that resists any change in its motion
Term
 inertial mass
Definition
 a body's resistance to a change in motion, use an inertial balance
Term
 mass density
Definition
 ratio between the mass of an object and its volume
Term
 weight density
Definition
 ratio of weight of an object to its volume
Term
 energy
Definition
 the ability to do work
Term
 potential energy
Definition
 energy stored within a system
Term
 gravitational potential energy
Definition
 energy stored within a system due to an object's height above an arbitrarily chosen reference point
Term
 internal potential energy
Definition
 the energy stored in the atoms and electrons due to their arrangement within a material
Term
 kinetic energy
Definition
 energy in motion
Term
 law of conservation of mechanical energy
Definition
 in an isolated system, the total kinetic and potential energies remains constant
Term
 law of conservation of energy
Definition
 in any energy transformation, the energy put in or used is equal to the energy output
Term
 law of conservation of matter
Definition
 when matter is transformed from one type into another, no mass is lost
Term
 derived units
Definition
 represent a combination of fundamental units or are a combination of fundamental units
Term
 fundamental unit
Definition
 a unit measure of a basic physical quantity such as mass, length, time
Term
 meter
Definition
 fundamental unit for length
Term
 kilogram
Definition
 fundamental unit for mass
Term
 second
Definition
 fundamental unit for time
Term
 unified atomic mass units
Definition
 unit for mass on the atomic level, equal to 1/12 the mass of a carbon-12 atom
Term
 weight
Definition
 gravitational pull on an object
Term
 candela
Definition
 fundamental unit of luminous intensity
Term
 ampere
Definition
 fundamental unit of electric current
Term
 kelvin
Definition
 fundamental unit of temperature
Term
 mole
Definition
 fundamental unit of amount of substance
Term
 newton
Definition
 unit for weight in the MKS system
Term
 volume
Definition
 the amount of space an object takes up
Term
 accuracy
Definition
 how close your value is to the accepted value
Term
 precision
Definition
 how close the measurements in a set are to each other
Term
 percent error
Definition
 measured as the absolute value of the accepted value minus the experimental value over the accepted value times 100
Term
 significant figures
Definition
 the important digits in a measurement that are known with certainty plus one more digit that has been estimated (uncertain digit)
Term
 graph
Definition
 a drawing that tells you if the variables plotted are related and if they are what the relationship is
Term
 independent variable
Definition
 the variable in an experiment that is purposely changed
Term
 dependent variable
Definition
 the variable that changes due to changes in the independent variable
Term
 scalar
Definition
 a measurement that has a size (magnitude) and a unit
Term
 vector
Definition
 a measurement that has a size, a unit, and a direction
Term
 frequency
Definition
 the number of vibrations per second (in an inertial balance or other device)
Term
 period
Definition
 the number of seconds per vibration (in an inertial balance or other device)
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