As we can see in the illustration, Jeff stepped on the end of the board or lever and caused a huge, 600 pound rock to be lifted in the air. The BEST explanation of what happened is

Jeff did work

The rock did work

No work was done because the lever was used

No work was done because the rock was moved vertically

The anwser is: wave a has a greater pitch and frequency.

Perhaps seek some professional ? it isn't very asking some children who are just trying to find out answers to homework.also, it seems professional would actually be good to you. obviously it isn't going to magically fix your depression, but it'll do something. drugs, smoking weed, it won't do much, especially if your husband is against it. if you do it he'll dislike it. but talk to him, try and get him to listen to you, and figure everything out together, okay? there's a website- maybe it can offer some ?

  bv hb ouj bv gv gtrxr