CCCT9012 Our Place in the Universe The University of Hong Kong - CCST 9012midterm solution 2019 WITH COMPLETE DETAILED ANSWERS

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CCCT9012 Our Place in the Universe Mid-term exam March 21, 2018 Length of exam: 75 minutes Students are allowed to bring a piece of A4 paper, written or printed on both sides, into the examinatio... n. Provide explanations and steps on how you arrive at the answers. Little credit will be given to answers without adequate explanations. Do not include information in your response that is not related to the solution. Use diagrams to illustrate your answers as necessary. The weighting of marks do not necessarily reflect the difficulty of the problems. 1. An HKU Lecturer routinely purchases lunch on 3rd St. in Sai Ying Pun. For most of the year, he notices that he enjoys shelter from the midday sun provided by buildings on this street. However, at times, these shadows no longer appear or are too short to provide any relief. Which buildings are providing the shade, the ones on the north or south side of the street? [10] During which season or seasons will the shade disappear? [10] The path of the sun is tilted towards the south so that most of the year in HK, midday shadows should point north. This means the buildings on the north side of the street will not cast a shadow onto the street. It will be the shadows of buildings on the south side [Show More]

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