can someone help me with this one please?

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can some please help me with this one? it's from the "Advanced semiconductor fundamentals" book by robert f pierret.44f.JPG
Two point charges are placed along a horizontal axis with thefollowing values and positions: +3mc at x =0cm, -7mc at x=20cm. Atwhat point along the x-axis is theelectronic field zero?Can someone help me with this?
It would be great if someone can help me with this physics problem
I struggling with, Thanks!
Hello, Please help me to solve this question, what is the required I didn't get it ? Can anyone show me how to solve with the final answer?
Can someone please help me with this: I dont have strong opinion about this. Please help me, I really need help with this. It is related to the article "microbes of the upper troposphere" Summarize the opinion about microorganisms in the troposphere in one or two paragraphs. Support your argument with evidence.
Can someone help me with this problem please from general
physics 2.
The figure shows two tiny 5.0-g spheres suspended from very light 1.0-m-long thread; The spheres repel each other after each one is given the same positive charge and hang at rest when b = 4.1 degree. What is the charge on each sphere? (k= 1/4 pi epsilon 0 = 9.0 times 10^9 N middot m^2/C^2)
Can someone please help me with this physics problem pertaining to
electricity!? I will give a like! Thanks in advance!
4. A charge Q (-5.00 10' C) and two unknown point charges q and q2 are arranged as shown. The electric field at the origin due to these three charges is known to be O. What is the vaide charge q? a. 30° 0.7 m 42 1.4 m
Can someone please explain to me (and help me) how to get the last two please?
Can someone please help me?
can someone please help me with this???