Chapter 21, Problem 25P

* An experimental apparatus has two parallel horizontal metal rails separated by 1.0 m. A $2.0-\Omega$ resistor is connected from the left end of one rail to the left end of the other. A metal axle with metal wheels is pulled toward the right along the rails at a speed of 20 m/s. Earth's uniform $5.0\times {10}^{-5}-\text{T}\stackrel{\to }{\text{B}}$ field points down at an angle of $53°$ below the horizontal. Make a list of the physical quantities you can determine using this information and determine two of them.