Feynman's answers?

Mechanics

Explain two problems of this statement of Newton’s First Law of Motion.

Why doesn't the Moon fall into the Earth?

Thermodynamics

Is heat a noun or a verb?

Does the entropy of an ideal gas remain unchanged or increase?

Optics

What are the characteristics of an image formed by a plane mirror?

Waves

Why is the sky blue?

Electromagnetism

What do you understand by the term electric current?

Are the input potential difference and the output electromotive force of an ideal transformer in phase or out of phase?

Modern physics

Based on Heisenberg’s uncertainty principle, which of the diagram below shows the correct position where Δx and Δp are defined?

Is the nature of energy discrete or continuous?