Unit Conversion and Dimensional Analysis Essentials

What is the primary goal of dimensional analysis in unit conversion?

• To simplify complex equations

• To memorize conversion factors

• To ensure units cancel out correctly

• To find the exact numerical value

What is a conversion factor?

• A mathematical constant

• A unit of measurement

• A number that changes the value

• A fraction that equals one

How many inches are there in one foot?

• 13 inches

• 11 inches

• 10 inches

• 12 inches

What happens if you multiply your original value by a conversion factor?

• The value and units change

• Nothing changes

• The value changes

• The units change

If you have 36 inches, how many feet is that?

• 3 feet

• 4 feet

• 2 feet

• 5 feet

What is the correct conversion factor to convert 5 feet to inches?

• 12 feet / 1 inch

• 1 foot / 12 inches

• 12 inches / 1 foot

• 1 inch / 12 feet

What is the mass in pounds of a man who weighs 75.0 kg?

• 170.0 lb

• 165.0 lb

• 160.0 lb

• 150.0 lb

What is the conversion factor for kilograms to pounds?

• 1 lb / 2.2 kg

• 2.2 lb / 1 kg

• 1 kg / 2.2 lb

• 2.2 kg / 1 lb

Why is it important to check the number of significant figures in your final answer?

• To make the calculation easier

• To avoid unit cancellation

• To simplify the conversion factor

• To ensure the answer is precise

What should you do if you don't know a conversion factor off the top of your head?

• Use a different unit

• Guess the value

• Look it up

• Skip the problem