ฟิสิกส์

Click http://http://www.pt.ac.th/ptweb/prajead/%E0%B8%84%E0%B8%A5%E0%B8%B7%E0%B9%88%E0%B8%99/%E0%B8%9E%E0%B8%B7%E0%B9%89%E0%B8%99%E0%B8%90%E0%B8%B2%E0%B8%99/%E0%B8%9E%E0%B8%B7%E0%B9%89%E0%B8%99%E0%B8%90%E0%B8%B2%E0%B8%991/%E0%B8%84%E0%B8%A5%E0%B8%B7%E0%B9%88%E0 link to open resource.