Sunday
April 20, 2014

Homework Help: physics

Posted by Bobby on Monday, April 6, 2009 at 8:35pm.

PLEASE HELP!! I HAVE A TEST TOMORROW!!

if Q=30 uC, q=5.0 uC, and d=30cm, what is the magnitude of the electrostatic force on q in N?

(Ke= 8.99 x 10^9 Nm^2/C^2)
(uC= micro coulombs)
(u= 10^-6)

a. 15
b. 23
c. zero
d. 7.5
e 38

i don't know where to start with this problem. i don't even have a formula if there is one.

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