A car is driven at an average speed of 100.0 km/hr for 2 hours, then at an average speed of 50.0 km/hr for the next hour. What was the average speed for the 3-hour trip?

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

When you turn on a battery-operated device, an electrical circuit is

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.