Physics Skills: Units Part 2

This video tutorial covers the importance of using SI units in physics, focusing on SI prefixes and unit conversions. It provides guidelines for writing units correctly and highlights common mistakes to avoid. The tutorial also offers tips for exams, emphasizing the need to use the correct units in calculations and graphing. The lesson concludes with a summary and a preview of the next topic on dimensional analysis.

Why is it important to use SI units in physics?

• They help avoid calculation errors and ensure consistency.

• They are easier to remember than other units.

• They are used only in physics exams.

• They are the only units recognized worldwide.

Which of the following is NOT an SI prefix?

• Giga

• Mega

• Deca

• Nano

How many nanometers are there in one millimeter?

• 1,000

• 10,000

• 100,000

• 1,000,000

What should you do if you are unsure about converting between two prefixes?

• Use the largest prefix available.

• Always multiply by 10.

• Convert in multiple steps if necessary.

• Use a calculator to guess the conversion.

What is the correct way to write a unit named after a person?

• With a lowercase letter

• With an uppercase letter

• With a space between the number and unit

• With a slash between the number and unit

When converting from kilometers per hour to meters per second, what should you do?

• Divide by 3.6

• Divide by 1,000

• Multiply by 1,000

• Multiply by 3.6

Which of the following is a correct rule for writing units?

• Use uppercase for all unit abbreviations.

• Use a space between the number and the unit.

• Use multiple prefixes for clarity.

• Always use plural forms for unit abbreviations.

What is the SI unit for measuring temperature?

• Kelvin

• Fahrenheit

• Rankine

• Celsius

Why is it important to check units before using a calculator?

• To save battery life.

• To avoid incorrect results due to wrong units.

• To make the calculation faster.

• To ensure the calculator is working properly.

What is the correct unit for specific heat capacity?

• Joules per kilogram per Celsius

• Calories per gram per Celsius

• Joules per gram per Kelvin

• Joules per kilogram per Kelvin