常识大全 | 亚博国际手机官网大全 | 诗歌大全 | 亚博国际手机官网 | 教学资料
当前位置:轻松教学网亚博国际手机官网竞赛试题物理竞赛高中物理竞赛奥林匹克物理竞赛第28届国际物理奥林匹克竞赛试题及解答(英文)下载

第28届国际物理奥林匹克竞赛试题及解答(英文)

  • 名称:第28届国际物理奥林匹克竞赛试题及解答(英文)
  • 类型:奥林匹克物理竞赛
  • 授权方式:免费版
  • 更新时间:03-24 15:49:51
  • 下载要求:无需注册
  • 下载次数:625
  • 语言简体中文
  • 大小:117 KB
  • 推荐度:3 星级
《第28届国际物理奥林匹克竞赛试题及解答(英文)》简介

标签:高中物理竞赛试题,高中物理竞赛, 本站提供第28届国际物理奥林匹克竞赛试题及解答(英文)免费下载,http://www.qingsong8.com
第28届国际物理奥林匹克竞赛试题及解答(英文)

Theory Question No.1
Scaling (a) A small mass hangs on the end of a massless ideal spring and oscillates up and down at its natural frequency f. If the spring is cut in half and the mass reattached at the end, what is the new frequency f ′ ? (1.5 marks)

(b) The radius of a hydrogen atom in its ground state is a0 = 0.0529 nm (the “Bohr radius”). What is the radius of a “muonic-hydrogen” atom in which the electron is replaced by an identically charged muon, with mass 207 times that of the electron? a′ Assume the proton mass is much larger than that of the muon and electron. (2 marks)

(c) The mean temperature of the earth is T = 287 K. What would the new mean temperature T ′ be if the mean distance between the earth and the sun was reduced by 1%? (2 marks)

(d) On a given day, the air is dry and has a density ρ = 1.2500 kg/m3. The next day the humidity has increased and the air is 2% by mass water vapour. The pressure and temperature are the same as the day before. What is the air density ρ ′ now? (2marks)
Mean molecular weight of dry air: 28.8 (g/mol) Molecular weight of water: 18 (g/mol)
Assume ideal-gas behaviour.








高中物理竞赛题      高中物理全国竞赛题      高中物理国际奥赛题,大小:117 KB
标签:奥林匹克物理竞赛,高中物理竞赛试题,高中物理竞赛,竞赛试题 - 物理竞赛 - 高中物理竞赛 - 奥林匹克物理竞赛