Temporal measurement, chronometry, takes two distinct period forms: the calendar, a mathematical tool for organizing intervals of time, and the clock, a physical mechanism that counts the passage of time. In day-to-day life, the clock is consulted for periods less than a day whereas the calendar is consulted for periods longer than a day. Increasingly, personal electronic devices display both calendars and clocks simultaneously. The number (as on a clock dial or calendar) that marks the occurrence of a specified event as to hour or date is obtained by counting from a fiducial epoch—a central reference point. COUNT 5
QSN1 What is a mathematical tool used for organizing intervals of time? ANS1 the calendar QSN2 What is a physical tool that tracks the passage of time? ANS2 the clock QSN3 Which tool is used in day to day life? ANS3 the clock QSN4 Which tool is used in periods longer than a day? ANS4 the calendar QSN5 How is the number that marks the occurrence of an event obtained? ANS5 by counting from a fiducial epoch—a central reference point