Orange light has a wavelength of 600nm. calculate the frequency if the speed of light in vacuum​

What is friction? how does it affect the motion of an object?

When using the scientist method, which step comes last?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.