Consider a conducting rod of length 28cm moving along a pair of rails, and a magnetic field pointing perpendicular to the plane of the rails. At what speed (in m/s) must the sliding rod move to produce an emf of 0.75V in a 1.75T field?

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

If steel is more dense that lake water, why can a boat float