An infinitely long, straight, cylindrical wire of radius R R has a uniform current density → J = J ^ z J→=Jz^ in cylindrical coordinates. What is the magnitude of the magnetic field at some point inside the wire at a distance r i < R ri

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b