What does a balance , meter stick, spring scale , thermometer, and stop watch measure

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

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)