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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 22.5 | Evolution of Stars |
1. The total energy emitted by the Sun in radiation process is 63,000,000 W/m2. How much mass does the Sun lose in one second because of this radiation? Take the radius of the Sun as R = 6.96 × 105 km.
Hint! Use the mass-energy equivalence to find the mass lost.
Correct Answer: B
2. A white dwarf has a radius of 5000 km and the same mass as the Sun. Calculate its average density.
Correct Answer: D
3. A supernova explosion is visible on Earth one week after it occurs. What is the distance of this supernova from Earth?
Correct Answer: A
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