The gravitational force between which two objects would be the most difficult to notice?
OA. a water particle and an air particle
OB. the Moon and a water particle
C. the Earth and the Sun
OD. the Moon and the Earth

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.