Across
- 1. :the only way that thermal energy can travel through empty space.
- 3. :change of momentum
- 4. :the rate at which electric charge passes a point in a circuit
- 6. :is product of mass and velocity.
Down
- 2. :the height of a crest or the depth of a trough from the undisturbed position.
- 5. where particles are further apart