A car accelerates from rest to 50 m/s with an acceleration of 10 m/s². How long does this acceleration take? (5 seconds)

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips. 

Well it depends on the object or substance