1 point A plane passes over Somton with a velocity of 8,000 m/s north. The plane passes over Alton at a velocity of 10,000 m/s north 40 seconds later. What is the plane's acceleration from Somton to Alton?

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Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.