Astronomy - speed of debris of supernova inner ring

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SUMMARY

The discussion focuses on calculating the speed of debris impacting the inner ring of Supernova 1987A, which is located 0.7 light years from the explosion site. The total energy released by the supernova is approximately 10^46 Joules. Participants suggest using the relationship between distance and time to determine speed, drawing parallels to simpler speed calculations, such as traveling 50 miles in one hour. The key takeaway is that speed can be derived from the distance traveled over time, specifically for the debris that has been moving since 1987.

PREREQUISITES
  • Understanding of basic physics concepts, specifically kinetic energy equations.
  • Familiarity with astronomical distances, particularly light years.
  • Knowledge of speed calculation formulas (speed = distance/time).
  • Basic comprehension of supernova phenomena and their implications in astrophysics.
NEXT STEPS
  • Research the kinetic energy formula and its application in astrophysical contexts.
  • Learn about the properties and behavior of supernovae, focusing on Supernova 1987A.
  • Explore methods for calculating speed from distance and time in various scientific scenarios.
  • Investigate the implications of supernova debris on surrounding cosmic structures.
USEFUL FOR

Astronomy students, astrophysicists, and educators looking to deepen their understanding of supernova mechanics and debris dynamics.

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Homework Statement


Compute the speed of debris seen hitting the inner ring of Supernova 1987A. Assume radius of inner ring is 0.7 light years.

Homework Equations




The Attempt at a Solution


I'm not quite sure where to start. I thought about just using kinetic energy = 0.5mv^2 because I can find the total energy released on Wikipedia (10^46 J), but what would I put for m? Then I realized that way, I'm not using the radius that they gave me, so it's probably wrong. So...

I'd appreciate any guidance!
 
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Inner ring started traveling in 1987 and has reached a distance of 0.7 ly. You have time and distance. Can you calculate speed from that?

How about this problem... if it takes me an hour to travel 50 miles, how fast am I travelling?
 

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