Home › Forums › setting the stage › solids as quantum systems › solid This topic has 1 reply, 1 voice, and was last updated 2 weeks, 1 day ago by Yi Li. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts September 28, 2025 at 9:14 am #13197 Yi LiParticipant it has hardness and can be touched. It could be changed easily September 28, 2025 at 9:14 am #13198 Yi LiParticipant it couldnot be changed easily Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In