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Comment by db48x

I’m not so sure that it is.

The mass of a bullet is more like 5 grams, and the mass of a satellite could be around 500,000 kg (the ISS). A quick search shows the the largest commercial communications satellite is Telstar 19V, with a mass of 7,076kg; in my first estimate I guessed 50,000kg. Finally, the closing velocity of two objects in orbit could be up to 22.4 km/s.

rifle bullet: 3×10³ J

Telstar 19V, geostationary orbit: 3.3×10¹⁰ J

Telstar 19V, geostationary transfer orbit: 3.5×10¹¹ J

ISS, LEO: 1.2×10¹³ J

hypothetical fast ISS: 1.1×10¹⁴ J

14−3 gives 11 orders of magnitude, but good luck making the ISS go that fast. Also, don’t forget to add in the kinetic energy of the net; it’s not going to be zero.

Still, even 7 orders of magnitude qualifies as ”quite a few”. You don’t need very many orders of magnitude before you have too many.

parent db48x 5 years ago

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