Measurement is fundamental in physics. We need accurate tools to measure length and time. The ruler helps us measure length in centimeters, while the stopwatch measures time intervals precisely.
Length units form a hierarchy. The meter is the base unit. One kilometer equals one thousand meters. One meter equals one hundred centimeters. One centimeter equals ten millimeters. Understanding these conversions is essential for accurate measurements.
Proper ruler technique is crucial for accurate measurements. Always align the zero mark with one end of the object. Place your eye perpendicular to the scale when reading. The measurement here shows eight point zero centimeters. Estimate between the smallest divisions for maximum precision.
Time units follow a systematic pattern. One day contains twenty-four hours. One hour contains sixty minutes. One minute contains sixty seconds. For precise measurements, we use milliseconds, where one second equals one thousand milliseconds. These conversions are essential for time calculations.