Multiple Choice
In the SI system, what is the unit of force?
1. Intro to Physics Units
Introduction to Units
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The earth's circumference is approximately 40.1 Mm (megameters). What is this circumference in kilometers?
A
0.0401 km
B
40,100,000 km
C
40,100 km
D
0.00401 km
Verified step by step guidance1
Understand the unit conversion: 1 megameter (Mm) is equal to 1,000 kilometers (km).
Identify the given value: The earth's circumference is 40.1 Mm.
Set up the conversion: Multiply the number of megameters by the conversion factor to convert to kilometers. This means you will multiply 40.1 Mm by 1,000 km/Mm.
Perform the multiplication: Calculate 40.1 multiplied by 1,000 to find the circumference in kilometers.
Interpret the result: The calculated value will give you the earth's circumference in kilometers, which should match the correct answer provided.
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