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Comment: Re:Negative mass- not antimatter, but odd (Score 1) 214

by suutar (#47478909) Attached to: Cosmologists Show Negative Mass Could Exist In Our Universe

The sum of energy being zero does not mean either particular component is zero. +apple can have scads of energy as long as -apple has negative scads, and transferring some +apple's energy to the wall does not change the total energy in the system. It does probably mean that -apple will catch up to and pass +apple, at which point the acceleration will be in the other direction but the exact behavior depends on relative speeds because that affects distances. (I'm ignoring the effect of gravitational interaction between the wall and -apple because the apples are going too fast to stay near it, and I'm ignoring -apple's impacts on +apple and the wall because someone above was saying that since negative matter isn't likely to have electrons it's not likely to have any trouble just sliding through.)

Mathemeticians stand on each other's shoulders while computer scientists stand on each other's toes. -- Richard Hamming

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