What is the efficiency of a rope and pulley system if a window washer uses 2.5 kJ of mechanical energy to pull up a 25 kg bucket of water at a constant speed to the height of 5.5 m?

Idont understand the question

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 ?