Question 2
Question 2 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
1. Physical quantities an...
1.2. SI units

recall the following SI base quantities and their units: mass (kg), length (m), time (s), current (A), temperature (K)

25. Astronomy and cosmolo...
25.1. Standard candles

understand the term luminosity as the total power of radiation emitted by a star