(1-4) 1. Compare and contrast a cochlear implant and a hearing aid.?

Question

2. How is an ultrasound associated with both sound and light?

3. Related to particles, why does a tuning fork make a louder sound when touching a table versus being held in the air when struck?

4. A piece of cloth appears red under red light, green light, and blue light. What color is the cloth? Explain why it cannnot be any other color.

Answer 1

1. cochlear implants feed sound vibrations directly to the bone while hearing aids amplify sounds and perhaps filter them and speak them into the ear.
2. Hunh?
3. The table resonates with the vibrations making a much larger surface to move air.
4. No cloth will appear red under green or blue light. The obvious answer 'red' would appear black or dark grey under green or blue light.