I know that you are most contagious in the couple of days before symptoms show and for the couple of days after. But how does that apply to exposure. For example, a person is exposed in the afternoon, are they automatically contagious after exposure or does that take time to "build up" in the body?
I always assumed that doing so would simply involve somehow getting the overall mass of the planet, then taking (mass of other planet) divided by (mass of Earth) multiplied by our own Earth gravity. But today I was browsing Youtube when somebody in the comments section of a Star Wars video said that it wasn't so simple and it involved taking into account other nearby planets and the planet's moon(s).
Is this true? If so what are the factors that you need to calculate a planet's gravity?
I've read about studies showing that during adolescence a child's IQ can increase or decrease by up to 15 points.
What causes this? And why is it set in stone when they become adults? Is it possible for a child that lost or gained intelligence when they were teenagers to revert to their base levels? Is it caused by epigenetics affecting the genes that placed them at their base level of intelligence?
I was reading about how the components in a mixture haven't reacted with each other so can be separated via boiling which got me wondering what does it mean for them to react with each other. I've always thought of it as bonds forming but this doesn't seem true here as bonds exist between the atoms in the mixture so how do you classify whether they've reacted or not?