Answer:B.As the north pole of the electromagnet nears the south pole of the permanent magnet, the current reverses and the poles of the magnets then repel.
Explanation:
I think is reaction
STIMULUS: In physiology, a stimulus is a detectable change in the internal or external environment. When a stimulus is applied to a sensory receptor, it elicits or influences a reflex via stimulus transduction.
<span>Before we can use parallax to measure the distance to a nearby star, we first need to know the Earth-Sun distance.
Not before we find out what the distance between our planet and the Sun is can we use the parallax to measure the distance to a nearby star.
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