a las 8:00 de la mañana salen dos camiones, uno desde la ciudad de villa mercedes con rumbo a mendoza y otro desde la ciudad de san luis con rumbo a buenos aires si el camion que va a mendoza se desplaza a una rapidez de 90km/h y el que salió de san luis lo hace con una rapidez de 120km/h ¿donde y cuando se cruzarán? suponer que la distancia entre san luis y villa mercedes es de 90km

An observer that stands still as the electron moves by him, will observe

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law