Questions about Transformers

I just started reading about Transformers model. I have barely scratched the surface of this concept. For starters, I have the following 2 questions

1. How positional encoding are incorporated in the transformer model? I see that immediately after the word embedding, they have positional encoding. But I'm not getting in which part of the entire network it is being used?

2. For a given sentence, the weight matrices of the query, key and value, all of these 3 have …

computervision concept embedding encoding network part positional encoding questions reading transformer transformer model transformers word