3 ms·
It's only a rounding error because rounding 10¹⁸ to 10²⁰ is a thing you do in astrophysics.
by cwillu 4y ago
It's only a rounding error because rounding 10¹⁸ to 10²⁰ is a thing you do in astrophysics.
- ben_w 4y agoKinetic energy of 100kg at 0.1c is ≈ 4.5e16 J Minimum possible life support for a human ≈ human basic metabolic rate ≈ 73 W Divide energy by power to get time; that's 20 million years, which at that speed would get you to Andromeda before the lowest possible energy cost of life support reached the lowest possible energy cost of the velocity.