Hi, welcome to World University and School Wiki. Thanks for your edit to the Physics page.
Please sign in and create a user name. It's an easy way to keep track of your contributions and helps you communicate with the rest of the community.
This is the discussion page for an anonymous user who has not created an account yet, or who does not use it. We therefore have to use the numerical IP address to identify them. Such an IP address can be shared by several users. If you are an anonymous user and feel that irrelevant comments have been directed at you, please create an account or log in to avoid future confusion with other anonymous users.