**Ask a monkey a physics question thread**

[OngBonga]

So gravity can easily dominate EM at Planck scales.

Actually this isn't true, I'm failing to realise that there's just an outright war between gravity and EM at this scale, the EM will repel against the gravity and the gravity will fight the EM. I'm not sure which dominates.

[MadMojoMonkey]

Actually this isn't true, I'm failing to realise that there's just an outright war between gravity and EM at this scale, the EM will repel against the gravity and the gravity will fight the EM. I'm not sure which dominates.

I think I've addressed this in my prior post.

Those 2 forces are at war, as you say, but the ratio of their strength is constant - the distance between them cancels out when you calculate the ratio of electric to gravitational forces, because both forces are [some constant]*[particle properties]/r^2. When you divide them to show the ratio, the r^2 terms cancel, and we see that all that matters to that ratio is the constants and the particle properties, not the distance between the particles.