he New England Merchants Bank Building in Boston is 152 mm high. On windy days it sways with a frequency of 0.17 HzHz , and the acceleration of the top of the building can reach 2.4 %% of the free-fall acceleration, enough to

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.

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )