Across
- 4. Electric current that flows in only one direction.
- 7. The push of a power source supplies to the charge
- 9. This machine changes rotational motion into vertical motion.
- 11. A change in sound frequency caused by the sound source's motion, the listener's motion, or both.
- 12. The horizontal distance between the crests or between the troughs of two adjacent waves
- 14. Amount of charge flowing through the circuit.
- 15. This machine uses a fulcrum.
- 16. Number of waves per second. The unit is Hertz (Hz)
- 18. A part in a longitudinal wave where the particles are spread apart
- 19. A logarithmic unit of sound intensity.
- 21. A wave in which the particles of the medium vibrate parallel to the direction of the wave motion
Down
- 1. The opposition to the flow of charge through an electric circuit.
- 2. This machine uses a grooved wheel to change the direction of the force.
- 3. A disturbance in a medium that transfers energy from place to place
- 5. The part of a longitudinal wave where the particles of the medium are close together.
- 6. A wave in which the particles of the medium move perpendicularly to the direction the wave travels.
- 8. An electric circuit with a single path.
- 10. Type of current where the direction of flow alternates between forward and backward.
- 12. A doorknob is an example of this type of simple machine.
- 13. The quality of a sound that distinguishes one voice or instrument from another
- 17. This machine makes vertical motion easier by increasing the horizontal motion
- 20. A circuit composed of both, parallel and series circuits.