I need help with science: What are the three main categories of organelles within the cytoplasm?

(I need just three, give me examples)

please dont steal my points.

Why do electron microscopes have higher resolving power than light microscopes?

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

Since the energy was not raising the temperature of the water during these segments, what was the energy used to do instead? your answer must include an explanation of what is happening to the molecules.