FULL SCREEN PRINTER VERSION BACK Chapter 21, Problem 024 Two tiny, spherical wat
ID: 1886322 • Letter: F
Question
FULL SCREEN PRINTER VERSION BACK Chapter 21, Problem 024 Two tiny, spherical water drops, with identical charges of-7.85 x 10-16 C, have a center-to-center separation of 1.36 cm. (a) What is the magnitude of the electrostatic force acting between them? (b) How many excess electrons are on each drop, giving it its charge imbalance? (a) Number Units (b) Number Units SHOW HINT LINK TO TEXT Lo Ne Pet Question Attempts: 0 of 3 used SAVE FOR LATER SUBHIT ANSWER Scier Society Sports Travel All Rights Reserved. A Division o hn Wiley &.ns version 4.24.9.3 Yahoo P About >Explanation / Answer
(a)
Electrostatic force,
F = kq1q2 / r^2
F = 9*10^9 * (7.85*10^(-16))^2 / (1.36*10^(-2))^2
F = 2.99*10^(-17) N
(b)
We know that,
q = ne
-7.85*10^(-16) = n * -1.6*10^(-19)
n = 4906 excess electrons
4906 excess electrons are on each drop.
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