Time
Concept of time as intervals between physical events
Time in physics is defined by its measurement i.e time is what a clock reads. It is a scalar quantity. Time can be measured using the following:
The use of heart beat as time interval
Diagram of device use for monitoring the heartbeat.
Source: Google
The use of sand-clock as time interval
Diagram of sand-clock or hourglass for
Measuring time
Source: Google
The use of ticker-timer as time interval
Diagram of ticker-timer or hour clock for measuring time
Source: Google
The use of pendulum as time interval
Diagram of a pendulum for measuring time
Source: Google
The use of stopwatch/clock as time interval
Diagram of a stopwatch for measuring time
Source: Google
Measurements of time
The most natural time unit is the solar day. It takes the earth one solar day to complete one rotation about its axis.
1day = 24hours
1hour = 60minutes
1minute = 60seconds
Therefore the units of time is second(s). Its multiple units are shown above.
Questions
- The SI unit for time is ?
Answer: seconds
- It takes the earth ————– day to complete one rotation
Answer: one solar day
- What device do athletic used to check the total time cover by an athlete
Answer: stopwatch
- Another name for sand-clock is?
Answer: hour-glass
- Heartbeat device is used to ———-?
Answer: to check the rate of heartbeat
- Time is a ———– quantity
Answer: scalar quantity
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