Students are studying and i need help please HELLL

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Answer explain why it is not possible to deduce a complete order of reactivity.

What is the measured amount of a product obtained from a chemical reaction?