Project #38648 - need help

Three point charges are arranged as shown in the figure below. (Take q1 = 6.42 nC, q2 = 4.65 nC, and q3 = -3.09 nC.)

(a) Find the magnitude of the electric force on the particle at the origin.
 Incorrect: Your answer is incorrect. 
Your response differs from the correct answer by more than 10%. Double check your calculations. N

(b) Find the direction of the electric force on the particle at the origin.
 ° (counterclockwise from the +x-axis)
_______________________________________________________
2./4 pointsSerPSE8 23.P.025.
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Four charged particles are at the corners of a square of side a as shown in the figure below. (Let A = 4B = 5, and C = 5.)
(a) Determine the electric field at the location of charge q. (Use the following as necessary: qa, and ke.)
magnitude  
direction  ° (counterclockwise from the +x-axis)

(b) Determine the total electric force exerted on q. (Use the following as necessary: qa, and ke.)
magnitude  
direction  ° (counterclockwise from the +x-axis)

_______________________________________________

4)A proton accelerates from rest in a uniform electric field of 590 N/C. At one later moment, its speed is 1.10 Mm/s (nonrelativistic because v is much less than the speed of light).

(a) Find the acceleration of the proton.
 Incorrect: Your answer is incorrect. 
Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s2

(b) Over what time interval does the proton reach this speed?
 s

(c) How far does it move in this time interval?
 m

(d) What is its kinetic energy at the end of this interval?
 J
________________________________________
5)A uniform electric field of magnitude 584 N/C exists between two parallel plates that are 4.14 cm apart. A proton is released from rest at the positive plate at the same instant an electron is released from rest at the negative plate.
(a) Determine the distance from the positive plate at which the two pass each other. Ignore the electrical attraction between the proton and electron.
 m

(b) Repeat part (a) for a sodium ion (Na+) and a chloride ion (Cl).
 cm

Subject Science
Due By (Pacific Time) 08/27/2014 12:00 am
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