31 terms

physics

concerned with matter and energy

special revelation

the truth about God that can be found through the Bible

general revelation

the truth about God that can be found through the study of nature

classical physics

deals with subjects studied by physicists from the time of Galileo

Modern physics

new branches that have been developed to take physics in new directions: quantum mechanics, relativity, solid-state physics, and particle physics

cogitation

thinking deeply relying solely on whatever facts or insights you can discover within your own mind

observation

the careful watching and recording of events in nature for the purpose of enlarging what you already know

physical quantities

length and volume

fundamental unit

the result of direct measurement or physical characteristics

derived unit

the arithmetic combination of fundamental units, such as the cubic meter or cubic foot

fundamental quantity

a quantity measured in terms of a fundamental unit

derived quantity

a quantity measured in terms of a derived unit

U.S. customary system (FPS system)

the system most commonly used in the US for everyday measurements

metric system (SI) (MKS system)

the most common system of units used by scientists

cgs system

used in scientific work but not as much

standard

an unalterable fact that, by general agreement, sets the unit value of a fundamental physical quantity

meter

the first international standar of unit of length, indicated by a metal bar with inscribed marks

kilogram

the SI unit of mass

second

defined as 9,192,631,770 vibrations of the cesium- 133 atom

dimensional analysis

the technique that uses conversion factors that are equal to or approximately equal to 1 as a series of multiplied fractions to cancel out unwanted units and leave the desired units

significant digits

digits that convey information about the actual time of what you are measureing

exact number

result of simple counting

accuracy

a measurement that may be defined as the closeness to the actual value

precision

series of measurements may be defined as their closeness to each other

tolerance

the precision of a measuring instrument

mean value

all measurements of the same mass should differ no more than 0.000 001 g above or below the average

error of measurement

the amount of inaccuracy in a measurement

systematic error

some cause that affects every measurement in the same way

random error

cannot be eliminated and can include a host of unpredictable and uncontrollable factors in the shifting background of measurement

literal equation

an equation with variables standing for quantities

proportion

when one fraction is equal to another fraction