Consider a conducting rod of length 34 cm moving along a pair of rails, and a magnetic field pointing perpendicular to the plane of the rails. Required:
At what speed (in m/s) must the sliding rod move to produce an emf of 0.75V in a 1.75T field?

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

What happens when a rubber rod is rubbed with a piece of fur?

Frequency of electromagnetic waves that a radio station is assigned is called