Consider the equation . the dimensions of the variables v, x, and t are , , and , respectively. the numerical factor 3 is dimensionless. what must be the dimensions of the variable z, such that both sides of the equation have the same dimensions?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.