Comenzamos el estudio de un movimiento cuando la rapidez es de 20 m/s, y sabemos que durante 5 sec la aceleración es de 3 m/s2. ¿Cuánto valdrá la rapidez tras ese tiempo, expresada en km/h? AYUDE

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor