Dimensional Analysis Pre Aice

Front

What are significant figures?

Back

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

Front

How do you round a number to a specific number of significant figures?

Back

To round a number to a specific number of significant figures, identify the digit at the desired position, look at the digit to its right, and round up if it's 5 or greater, or leave it as is if it's less than 5.

Front

What is the formula to convert Kelvin to Celsius?

Back

To convert Kelvin to Celsius, subtract 273.15 from the Kelvin temperature: C = K - 273.15.

Front

What is the formula to convert Celsius to Kelvin?

Back

To convert Celsius to Kelvin, add 273.15 to the Celsius temperature: K = C + 273.15.

Front

Define hypothesis in scientific terms.

Back

A hypothesis is a proposed explanation for a phenomenon, which can be tested through experimentation and observation.

Front

What is the importance of significant figures in scientific measurements?

Back

Significant figures convey the precision of measurements and calculations, ensuring that results are reported with the appropriate level of accuracy.

Front

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

Back

To identify significant figures, 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 dimensional analysis?

Back

Dimensional analysis is a mathematical technique used to convert units from one system to another, ensuring that equations are dimensionally consistent.

Front

What is the purpose of unit conversion in scientific calculations?

Back

Unit conversion is used to ensure that measurements are in compatible units, allowing for accurate calculations and comparisons.

Front

What is the difference between precision and accuracy?

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Precision refers to the consistency of repeated measurements, while accuracy refers to how close a measurement is to the true or accepted value.