Fluorescent objects absorb light at one frequency (ultraviolet, for instance) and emit it again at a lower frequency (blue, for instance). In terms of the conservation of energy, explain why the emitted frequency has to be lower.

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Ineed pls urgent 1-20 in order and fully detail step my step.

Type the correct answer in each box. balance the chemical equation.__ n203 ➡️ __ n2 +__ o2