Gravitational-wave astronomy -- assignment 1

• Problem 1:
  Can we build a gravitational-wave emitter in the lab, say, a rotating dumbbell? How much energy would it release in GWs? How long would it take to release a graviton?
  
  
• Problem 2:
  Estimate the gravitational-wave energy flux on Earth from a binary neutron star merger in the Virgo cluster. Compare with the light flux from Sirius.
  
  
• Problem 3:
  Do gravitational waves get absorbed/dispersed? Hint: consider a universe filled with spheres with a given resonant frequency and damping time.

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