What is the second law of thermodynamics?
What is the index of refraction of air?
Why is mercury used in thermometers rather than water?
How spectral lines show discrete energy levels in an atom. : quantum physics
Why is it difficult to stand on stilts ?
What is loudness of sound?
how many neutrons and how many protons are present in a single deuterium nucleus?
What does the mev in mev photon mean?
What is sonar ( sound navigation and ranging )?
What path does an asteroid take?
What is ultrasonic sound?
what is newton first formula
heat cannot pass from a cooler substance to a warmer substance without some other process being involved. This is an example of which law of thermodynamics?