Answer:
Answer is D. a north pole is near a south pole
Explanation:
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Answer:
The direction of the contact forces acting on a body is not necessarily perpendicular to the contact surface. The resolution of contact forces in two components i.e. perpendicular to contact surface and along surface. Perpendicular component is normal force and parallel component is friction.
Explanation:
Answer:
due to the magnetic field
Explanation:
magnetic field is the same in the vacuum
