.- Calcula el calor de reacción a presión constante de la reacción: CaC2(s) + 2 H2O(l)  Ca(OH)2(s) + C2H2(g) (Sol: -128 kJ) b) ¿Qué cantidad de energía se libera en la combustión de 100 dm3 de acetileno, C2H2, medidos a 25ºC y 1 atm? (Sol: - 5317 kJ)

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

Which type of wave can travel without a medium

What are the three ways that an object can accelerate