A plane moves at a certain velocity then accelerates at the rate of 52 m/s2 for a distance of 2300 m to reach a velocity of 620 m/s. How fast was the plane going before it began to accelerate?

26.4 is about the right time

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.