¿ Dónde se encuentran las personas ?¿que están haciendo ?,¿por que lo hacen? ¿Qué pasaría con su salud si no se detuviera a realizar esta actividad física?
si tuvieras que organizar una secuencia de posturas ¿por que orden podrías? ¿ que otras posturas recomendarías ? explica las secuencia utilizando los números utilizados

Distinguish between a transverse wave and a longitudinal wave.

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?