State and explain the laws
- state and explain the laws of thermal conductivity
- state and explain the laws of conservation of mass
- state and explain the laws of chemical combination
- state and explain the laws of illumination
- state and explain the laws of refraction of light
- state and explain the laws of friction
- state and explain the laws of limiting friction
- state and explain the laws of reflection of light
- state and explain the laws of vibrating strings
- state and explain the laws of reflection
