P5 Dimensional analysis

Front

What is the difference between accuracy and precision?

Back

Accuracy refers to how close a measured value is to the actual (true) value, while precision refers to how close multiple measurements are to each other.

Front

How do you calculate the volume of a rectangular prism?

Back

Volume = length × width × height.

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How do you determine the number of significant figures in a measurement?

Back

Count all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Leading zeros are not counted.

Front

What is the significance of the triple beam balance in measuring mass?

Back

A triple beam balance is a device used to measure mass with high accuracy and precision by balancing the mass of an object against known weights.

Front

How do you round a number to one significant figure?

Back

Identify the first non-zero digit and round the number based on the digit immediately following it.

Front

What is the formula for density?

Back

Density = mass/volume.

Front

What is dimensional analysis?

Back

Dimensional analysis is a mathematical technique used to convert units from one system to another and to check the consistency of equations.

Front

How do you convert units using dimensional analysis?

Back

Multiply the quantity by conversion factors that cancel out the original units and introduce the desired units.

Front

What is the importance of using significant figures in calculations?

Back

Using significant figures ensures that the precision of measurements is accurately represented in calculations and results.