Understanding Measurement in Physics

Front

What is the SI unit of length?

Back

meter

Front

Mass and its SI unit.

Back

Mass is defined as the amount of matter in an object, and its SI unit is the kilogram (kg).

Front

What is the difference between precision and accuracy in measurements?

Back

Precision is about consistency; accuracy is about correctness.

Front

How do you convert 5 kilometers to meters?

Back

5000 meters

Front

Explain the concept of significant figures in measurements.

Back

Significant figures are the digits in a measurement that reflect its precision, including all non-zero digits, zeros between them, and trailing zeros in decimal numbers.

Front

How many significant figures does 3.45 cm have?

Back

3

Front

A car travels 150 km in 2 hours. Calculate its average speed in m/s.

Back

20.83 m/s

Front

Why is it important to use standard units in scientific measurements?

Back

It is important to use standard units in scientific measurements to ensure consistency, accuracy, and effective communication of results.

Front

How to measure the volume of an irregular object using water displacement?

Back

The volume of the irregular object is equal to the change in water level after submersion.

Front

If a scale reads 2.5 kg, what is the uncertainty in this measurement if the scale's precision is ±0.1 kg?

Back

±0.1 kg