A. Does the magnet have to be touching the nail to lift the tack or paper clip? b. How close does it have to be? Experiment with different-sized magnets.
c. Does the size of the magnetic field change with the size of the magnet?

ANSWER ALL A, B, AND C.
Thank you.

answer: (431,2)

step-by-step explanation:

measuring things 1 litre of water

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explanation:

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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