3) As shown by the map below, the major tectonic plates are the North American,
ID: 112335 • Letter: 3
Question
3) As shown by the map below, the major tectonic plates are the North American, Eurasian, South American, African, and Indo-Australian plates. Iceland (star) is located on both a plate boundary and a hot spot. The local spreading rate is approximately 2-3 cm per year.
a) Given that cities of Bolungarvik and Eskifjordur are on the North American and Eurasian plates, respectively, how much will the distance between the two cities likely change over the next 100 years?
b) Based on the above information and your geographic knowledge of the world and the fact that a Boing 747 (jet passenger plane) travels about 900 kilometers/hour, how will the flying time between London and New York City likely change in 100 years? (Note that there are 100 cm in a meter and 1000 meters in a kilometer.)
Eurasian plate uan de Fuca North Americ plate ATabian Philippiie ribbearn plate ate Paci pla ICELAND Arctic Circle Cocos plate African Bolungarv Isafjördur Drangajikall. sguoOOlafsfjagur South plate Nazca Ameriçan plate DalvikHúsavik BNatio plate Indo-Australia Sauoárkrókur Akureyri Seyoisfjorour Stykisholmut Kerlingarskard Egilsstaäir o Eskifjördur Scotia plate Antarctic plate Askja Helgafell Grundarfjo Hofsjökul Langjokuli SKAFTAF Keflavik o Reykjavik O Gullfoss NATIONAL PARK Njarovik Grindavik o Selfoss (2119m) Myrdaljiikull VESTMANNAEYJAR 0c ATLANTIC OCEAN -100 km 60 miles http://www.lonelyplan iceland/map_of_iceland jpgExplanation / Answer
a. Since we know that distance between cities of Bolungarvik and Eskifjordur is about 897 km. It is also given that the local spreading rate of plate is 2-3 cm/pr year. If spreading rate is about 3 cm in therefore in 100 years the distance of spreading between the two plates increases to about 300 cm or 0.003 km. Therefore the distance between these two cities after 100 years will become 897+0.003=897.003km.
b. We know that the air distance between london and New York city is 5584.424 km. It is given that speed of the jet plane is about 900 km/hr. Time taken to cover the distance of 5584.424 km by the jet plane if the speed of the plane is 900 km/hr is 5584.424/900=6.2 hour. We also know that local spreading rate is 2-3 cm/yr. In 100 years there will be spreading of 300 cm or 0.003 km. Total air distance will increase to about 5584.424+0.003=5584.427km. There will be only negligible increase or the time will remain almost same to reach from New york to london after 100 years by the plane. The time taken to cover the distance of 5584.427km between the two cities after 100 years will be 5584.427/900=6.2 hr.
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