Across
- 3. of heat through direct contact between particles
- 6. that opposes motion between two surfaces
- 10. to the flow of electric current in a circuit
Down
- 1. radiation that we can see
- 2. of complete cycles of a wave in a given time
- 4. back of light from a surface
- 5. that pulls objects toward each other
- 7. in a specific direction
- 8. of change of velocity
- 9. of an object in motion