Acar travels 5 miles north and then 2 miles south in 1/4 hour. what was its average velocity?

12 mph north

Explanation:

Average velocity is displacement over time.

v = Δx / t

If we take north to be positive and south to be negative:

v = (5 mi − 2 mi) / ¼ hr

v = 12 mi/hr

v is positive, so it is in the north direction.  Therefore, the average velocity is 12 mph north.

this a false

explanation:

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.