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i safari File Edit View History Bookmarks Window Help 84%)"], Tue 8:32 PM a ezto.mheducation.com My.UTEP Lecture 9 - PDF-C https://blackboard https://blackboardl Mail - abeard2@mi. UTEP Prof. Dirk Exa.. Homework Chapter. Physics question hot PHYS1404 Genenal Physics Il: Fall 2017 Alexandra Beard 34 PM YSICS Homework Chapter 17 instructions I help hot Question 10 (of 12) Save & Exit Submit 4 PM 10.00 points 11 PM 1 out of 8 attempts Give answer in scientific notation. Assistance A tiny hole is made in the center of the negatively and positively charged plates of a capacitor, allowing a beam of electrons to pass through and emerge from the far side. If31 V are applied across the capacitor plates and the electrons enter through the hole in the negatively charged plate with a speed of2.50 x 106 m/s, what is the speed of the electrons as they emerge from the hole in the positive plate? Check My Work View Hint View Question Show Me Guided Solution Practice This Question Print Question Help Report a Problem hot 51 PM (select) m/s ot 01 PM x 10 References eBook & Resources 26

Explanation / Answer

Given that,

deltaV = 31 V

lnitial speed of electron vi = 2.5*10^6 m/s

From conservation of energy,

change in KE = change in PE

(1/2)m*(vf^2 - vi^2) = q*deltaV

where, m = mass of electron

q = charge on electron

[(1/2)*9.1*10^(-31)] * [vf^2 - (2.5*10^6)^2] = [1..6*10^(-19) * 31]

vf^2 = 17.66*10^12

vf = 4.20 * 10^6 m/s

Speed of hole as they emerge from hole to positive plate, vf = 4.20 * 10^6 m/s

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