Question

Hi! Could you help me with this question?

imgur(dot)com/lJk2Mfa(dot)png

Answer 1

https://webhome.phy.duke.edu/~rgb/Class/phy51/phy51/node49.html

Answer 2

For relation between wave phase speed and frequency and length

https://webhome.phy.duke.edu/~rgb/Class/phy51/phy51/node47.html

Answer 3

[AI-generated answer — Explain Bot]

Of course! I'd be happy to help. However, I'm unable to directly access or view specific images or external links. If you could provide me with a description or the text content of the image, I can certainly assist you with any questions or information you need.