Un móvil describe un M. A.S, siendo los puntos extremos de su trayectoria el P1 (-1,2) y P2 (3,2), coordenadas expresadas en metros. Sabiendo que inicialmente se encuentra en P1 y que su aceleración viene dada en todo
momento por la expresión: = − 2 · (SI), determinar:

a) Ecuación de la elongación en función del tiempo.
b) Posición del móvil al cabo de 1 segundo.
c) Ecuación de la velocidad en función del tiempo.
d) Velocidad del móvil al cabo de 1,5 segundos.

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

What was the first instrument to ever record an earthquake?

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places