Questions
In a star about 5 billion kg of matter is converted into energy each second. The power output of the star in watt is
a
4.5×1026 W
b
4×1020 W
c
3×1026 W
d
3×1020 W
detailed solution
Correct option is A
E=mc2 ⇒Et=mtc2 ⇒P=5×109×9×1016 ⇒P=4.5×1026 WTalk to our academic expert!
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