What happen to steel when heated?​

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance

Hydrogen and helium are both members of?

The pressure proportional to the area a- inversely b- directly c- increase d-decrease