1

Physics, Astronomy & Cosmology / Re: If light is the fastest thing in the universe why do black holes suck it in?

« on: 23/10/2016 00:12:15 »

The simple answer is, they don't.

Einstein was right that event horizons cannot form. Before an event horizon can form, an infinite amount of time will pass for all of the universe. There hasn't been time, yet, for any event horizons to form. In 100 trillion years there still won't have been enough time.

The measureable distance from any point in space to any event horizon is infinite. Not even light can travel from any point in space to an event horizon in finite time.

2

Chemistry / Re: If the ice caps melt, they will dilute the salt water because they are made from fresh water, so

« on: 02/09/2016 00:53:12 »

Polar ice caps are formed from precipitation, like snow, that compresses over time to a hard ice pack. The precipitation comes from clouds which are formed by water evaporated from the ocean. The evaporation leaves the salt behind, just as distillation does.

There is a separate process, though, where freezing salt water will separate the salt and water. The mixture of water and salt with the lowest freezing point is the eutectic mixture. If you have more water than the eutectic, as you cool the mixture toward the eutectic temperature, crystals of pure water will precipitate out and float up. If the mixture has excess salt, salt crystals will precipitate out.

But, the ice cap thingy is distillation.