Multiple Choice
Sirius,the brightest star in the night sky coverts 3.216 * 1018 kg of its mass to energy every year.How does the luminosity (power radiated) of Sirius compare to that of the sun? Lsun = 3.906 * 1026 W
A) 17.6Lsun
B) 23.5Lsun
C) 3.56Lsun
D) 36.7Lsun
E) 42.0Lsun
Correct Answer:

Verified
Correct Answer:
Verified
Q8: Atoms consist of protons,neutrons,and electrons.Which determines an
Q9: A drug containing <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB1516/.jpg" alt="
Q10: A Geiger counter placed next to a
Q11: A tree is chopped down and burned
Q12: Assuming that 200 MeV of energy is
Q14: A certain radioactive isotope decays to one
Q15: An iron isotope of iron,<sup>56</sup>Fe,has a binding
Q16: A Geiger counter initially records 9876 counts
Q17: A nuclear fission power plant produces about
Q18: Betelgeuse has a luminosity (power radiated)135,000 times