Exam+2-Sample+A - EAS 1600 - INTRODUCTION TO ENVIRONMENTAL...

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Page 1 of 6 Pages EAS 1600 - INTRODUCTION TO ENVIRONMENTAL SCIENCES Sample 1 - Exam 2 < Answer all Questions < Place your name on each page < Show all your work < This is a closed-book exam; all are expected to comply with Georgia Tech Honor Code I am aware and in compliance with the Georgia Tech Honor Code Signature: ____________________________________________________________ Print Name: ___________________________________________________________ Lab Section: ___________________ ANSWER KEY
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Answer Key Exam 2 Version 1 Page 2 of 6 Pages 1. A planet has an atmospheric surface pressure of 1500 millibars (mb) and a radius of 5000 Km. The mass of its atmosphere is 10 20 Kg. a. [ 15 points] What is the mass of the planet? b. [ 5 points] If the average wind speed of the atmosphere is 10 m s -1 , what is the total kinetic energy of the atmosphere? ( 29 J ms Kg mV KE 21 2 2 20 2 10 5 2 10 10 2 1 × = × = = - 2. [10 points] Scientists believe that atmospheric aerosols cool the Earth’s surface temperatures. Explain the direct and indirect cooling effects. The direct effect is when aerosols reflect or backscatter radiation into space. The indirect effect is when hygroscopic aerosols cause cloud tops to be more reflective and the clouds to last longer thus increasing the planetary albedo. Kg Kg Kg Nm Km m Km N M R m GM F N Km m Km mb m N mb A P F P a P 23 20 2 2 11 2 3 3 19 2 19 2 3 3 2 2 10 8 . 1 10 10 67 . 6 10 10 5 10 8 . 4 10 8 . 4 10 10 5 4 10 1500 × = × × × × × × = = × = × × × × = × = - - - p
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This note was uploaded on 04/07/2011 for the course EAS 1600 taught by Professor Jimstjohn during the Summer '08 term at Georgia Institute of Technology.

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Exam+2-Sample+A - EAS 1600 - INTRODUCTION TO ENVIRONMENTAL...

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