javier quiere lanzar un pelota verticalmente hacia arriba para llegar al balcón de su departamento, que se encuentra a 4 m de altura, pero no sabe con qué velocidad inicial mínima hacerlo. Dos amigos, Gabriel y Gerardo, le ayudan a calcular esta velocidad, como se muestra a continuación:

All of the following are part of the biosphere except

Can someone me with 3 and 4 plz. this is for masteries test.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering