Eighty minutes. According to the inquiry of official website of Shandong Education, the lowest score of the second book of Shandong Physics Competition in 2023 is 80 points. The physics competition for college students in Shandong Province is sponsored by the Shandong Provincial Department of Education, the Science and Technology Department and the Shandong Physics Society, and jointly undertaken by the Provincial Higher Education System Reform Leading Group Office, Shandong University, Shandong University of Science and Technology and other provincial universities.