Select the correct answer. Forensic sclentists Immerse glass evidence Into a medium to determine Its refractive Index.
Which medium is usually used for determining the refractive Index?
O A water
OB air
OC. oil
D. gel
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its your mom

Explanation:

d. learned preferences i believe is your answer

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)