can i submit the recommendation of two science teachers on common app

Hi, thank you for asking your question. I agree with @gracecatan that "it's a lot more important and impactful to choose which teachers know you best, can advocate for you best, and who have seen your best work in the classroom and outside." I will add that you should include the one science teacher who knows you best at a personal level and can speak to your physics academic excellence. If both teachers are a tie, then it's okay to choose both of them, but don't feel like you have to just because you are applying for physics. If there is a teacher from another department that knows you incredibly well, then ask them instead. At least one science teacher is helpful though.

Best of luck!

I would say one from science teacher and another from a teacher you feel like you have the best personal connection with, that can talk about your character as well as performance, if that happens to be the other science teacher than that is perfect!