ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. An object is dropped from a platform 400 ft high. Ignoring wind resistance, how long will it take to reach the ground?

25 s
5.0 s
9.0 s
3.5 s

i would say the answer is food.

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a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

c. magnitude and direction

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