if a baceball is dropped from a skysrcaper, what will its speed (Velocity) be after 4.5 seconds (assuming no air resistance)

44.1m/s

Explanation:

Ah, objects in freefall!

We know that the inital velocity is 0, as it was being held from a skyscraper at time zero.

We also know that objects accelerate at uniform fashion at 9.8m/s

Since it did so for 4.5s, multiply them:

9.8m/s(4.5s) = 44.1m/s

That would be its final velocity as the initial was zero

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.

i think it's 35 meters