# Login to Watch FREE Videos

**Facebook Login**

- International Systems of Base Units DEMO
- Standard of length-metre
- Standard of Time-Second
- Standard of Mass-Kilogram

- Measuring with Meter Rule and Measuring Tape DEMO
- Introduction to Vernier Calipers
- Measuring with Vernier Calipers
- problem on Measuring with Vernier Calipers
- Introduction to Screw Gauge
- Measuring with Screw Gauge
- Mass measuring by Physical Balance
- Problem on Measuring with Screw Gauge
- Mass measuring by Lever Balance
- Electronic Balance
- Measuring Time by Stopwatch
- Measuring Volume by Cylinder
- Measuring Volume of Irregular Shaped Solid

- Introduction to Significant Figures DEMO
- Problem on Introduction to Significant Figures
- Rules to find the Significant Digits in a measurement
- Zero as significant figure
- Problem on Rules to Find the Significant Digits in a Measurement
- Addition and Subtraction of Significant figures
- Multiplication and Division with Significant figures
- Rounding Off the numbers
- Laboratory Safety
- Problem on Multiplication and Division with Significant Figures
- Problem on Rounding Off the Numbers