MasteringPhysics: Homework 4 Chapter 24 Secti 4-608 points). Google Chrome Secur

Question

MasteringPhysics: Homework 4 Chapter 24 Secti 4-608 points). Google Chrome Secure https: session masteringphysics.com/myct/itemView?assignment Problem 71220945 PH2200 University Physics ll Electricity & Magnetism Problem 24.39 Problem 24.39 Part A The earth has a vertical electric field at the surface, pointing What is the excess charge on the surface of the earth? down, that averages 109 N/C. This field is maintained by Express your answer with the appropriate units. various atmospheric processes, including lightning. Value Units Submit My Answers Give Up Incorrect, Try Again Ask me anything signed in as Fernando Chambole Hel Resources previous l 9 of 16 l next Provide Feedback Continue 1045 PM ENG 2/14/2017 R19

Explanation / Answer

As we know that

E = kQ/r^2

So you need to divide 109 by K but also multiple by r^2 to get Q.

Since r = 6.4 x 10^6 m it is fairly big number. 109 sounds way too big but use it anyway. Q is negative since its down

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