| http://www.w3.org/ns/prov#value | - ed to determine an object's velocity and position, as well as where and when two objects meet, by plotting the time data on a horrizontal axis and the position data on a vertical axis ??? ??? ??? scalar quantity such as temperature or distance, that are just numbers without any direction ??? ??? ??? slope of a position vs. time graph indicates both the magnitude and direction, indicates the averag
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