Aerial fireworks contain gunpowder and chemicals that produce colors. what elements would be responsible for producing red, green, and yellow colors?

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

What must be in balance for temperatures to remain constant?

Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.