A 15.0 nC charge is at x = 0cm and a -1.5 nC charge is at x = 3 cm. At what point or points on the x-axis is the electric potential zero?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

Which basic property determines a colored light's placement on the spectrum of visible light? a. speed b. frequency c. amplitude d. velocity

How do you know how many valence electrons an atom has?