Which types of heat transfer involve heat flow from hot objects to colder objects? a. convection, conduction, and radiation b. convection and radiation, but not conduction c. convection, but not conduction or radiation d. convection and conduction, but not radiation

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.