Textbook Question
The spectrum of the sodium atom is detected in the light from a distant galaxy. Use the Hubble law to calculate the distance of the galaxy from the earth.
88
views
1. Intro to Physics Units
Introduction to Units
Struggling with Physics?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
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.
1:30mWatch next
Master Introduction to Physics Channel with a bite sized video explanation from Patrick
Start learningRelated Videos
Related Practice
Introduction to Units practice set
Problem sets built by lead tutorsExpert video explanations