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A graphic illustrating time intervals using two number lines. the top line shows a 30-minute interval, while the bottom shows a 1 hour 30 minute interval, both clearly marked.
Ventricular repolarization, T wave. The QT interval of ECG. The cardiac cycle. ECG of a heart in normal sinus rhythm. Resources for teachers and students.
Stopwatch and calendar. Flat, purple, 8 days to go, countdown stopwatch, days to go calender. Vector illustration
This illustration visually demonstrates the concept of time intervals using analog clocks and number lines. it shows two examples, one measuring a 5-hour interval and another measuring a 3-hour interval.
Purple Clock icon isolated on white background. Time symbol. Abstract circle random dots. Vector

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