U1 - PHY / SCI9

Front

What is the difference between precision and accuracy in scientific measurements?

Back

Precision refers to how close measurements are to each other, while accuracy refers to how close measurements are to the true value.

Front

Choose the bigger number: 2.45×10^{-6} or 7.3×10^{-8}.

Back

2.45×10^{-6} is the bigger number.

Front

How many significant figures are in the number 100.5?

Back

4 significant figures.

Front

This image is an example of: precision ONLY, accuracy ONLY, BOTH precision and accuracy, NEITHER precision and accuracy.

Back

accuracy ONLY.

Front

Choose the smaller number: 9.5×10^4 or 9.21×10^7.

Back

9.5×10^4 is the smaller number.

Front

Define precision in the context of scientific measurements.

Back

Precision is the degree to which repeated measurements under unchanged conditions show the same results.

Front

Define accuracy in the context of scientific measurements.

Back

Accuracy is the degree to which a measurement represents the true value of the quantity being measured.

Front

What is the significance of significant figures in scientific measurements?

Back

Significant figures indicate the precision of a measurement and help convey the uncertainty in the measurement.

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.

Front

What is the scientific notation for the number 0.00073?

Back

The scientific notation is 7.3×10^{-4}.