Two objects, each of weight w, hang vertically by spring scales as shown in the figure. the pulleys and the strings attached to the objects have negligible weight, and there is no appreciable friction in the pulleys. the reading in each scale is

a: more than 2w.
b: less than w.
c: more than w, but not quite twice as much.
d: w.
e: 2w.

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.