Consider a square which is 1.0 m on a side. Charges are placed at ...

[bio_gurl]

Consider a square which is 1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 C at (0, 0); +4.0 C at (1, 1); +3.0 C at (1, 0); -3.0 C at (0, 1).
 
  What is the magnitude of the electric field at the square's center? A) 1.1  105 N/C
  B) 1.3  105 N/C
  C) 1.5  105 N/C
  D) 1.7  105 N/C
  E) 1.9  105 N/C

Question 2

The corresponding violin strings on two violins in an orchestra are found to produce a beat frequency of 2. Hz when a frequency of 660. Hz is played.
 
  What percentage change in the tension of one of the strings would bring them to the same frequency?

[brittanywood]

Answer to Question 1

A

Answer to Question 2

0.6

[bio_gurl]

Thank you!

[brittanywood]

Always glad to help...