A brass rod with a mass of 0.300 kg slides on parallel horizontal iron rails, 0.440

The magnitude of the magnetic field is  

Explanation:

From the question we are told that

   The mass of the rod is  

    The distance of separation is  

     The current is  

     The coefficient of friction is  

Generally for the rod the rod to continue moving at a constant speed

   The frictional force must equal to the magnetic field force so

Where  

and    

=>    

substituting values

Anthony will be warmer after the game because he is wearing a black shirt. Dark colors absorb more thermal energy than light colors.

Explanation: