1. Foundations
Physical Units — Quiz
Test your understanding of physical units with 5 practice questions.
Practice Questions
Question 1
Which of the following is the SI unit for length, frequently used in astrophysical calculations?
Question 2
Convert $2.5 \text{ light-years}$ to meters, given that $1 \text{ light-year} \approx 9.46 \times 10^{15} \text{ m}$.
Question 3
What is the primary purpose of using dimensional analysis in astrophysical calculations?
Question 4
If a star's radius is approximately $7 \times 10^8 \text{ m}$, what is its order of magnitude in meters?
Question 5
If the period of a binary star system scales with the inverse square root of its total mass ($P \propto M^{-1/2}$), and the total mass of a system is quadrupled, how does its period change?