jeannawillett8143 jeannawillett8143 10-04-2024 Physics contestada Two pendulums of length 1. 21m and 1. 0m start vibrating. At some instant, the two are in the mean position in same phase. After how many vibrations of the longer pendulum, the two will be in phase ?a. 10 b. 11 c. 20 d. 21