Question

The lifetime of a star Step 1 Use the amount of energy the star emits per second to find the mass the star changes into energy each second: m=E/c^2 We have already done this: If the luminosity of a star is 4 x 10^26 watts, how much mass does it change into energy each second? This example uses the luminosity of the Sun m = E / c^2 = 4 x 10^26 / (3 x 10^8)^2 = 4 x 10^9 kg

          The lifetime of a star

Step 1
Use the amount of energy the star emits
per second to find the mass the star
changes into energy each second: m=E/c^2

We have already done this:

If the luminosity of a star is
4 x 10^26 watts, how much
mass does it change into
energy each second?
This example uses the
luminosity of the Sun

m = E / c^2
= 4 x 10^26 / (3 x 10^8)^2
= 4 x 10^9 kg

The lifetime of a star

Step 1
Use the amount of energy the star emits
per second to find the mass the star
changes into energy each second: m=E/c^2

We have already done this:

If the luminosity of a star is
4 x 10^26 watts, how much
mass does it change into
energy each second?
This example uses the
luminosity of the Sun

m = E / c^2
= 4 x 10^26 / (3 x 10^8)^2
= 4 x 10^9 kg

Added by Jonathan B.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Timothy James

03/18/2023

Step 1

We know the luminosity of the star (the energy emitted per second) is 4 x 10^26 watts. Show more…

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The lifetime of a star Use the amount of energy the star emits per second to find the mass the star changes into energy each second: m=E/c^2 We have already done this: If the luminosity of a star is 4 x 10^26 watts, how much mass does it change into energy each second? This example uses the luminosity of the Sun 4 x 10^9 kg