/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: murphyikpi https://cdn.slidesharecdn.com/profile-photo-murphyikpi-48x48.jpg?cb=1523445995 a student in the CRUTECH CALABAR Faculty of Education Department of curriculum and instructional technology. Phycics option