Un cajón rectangular de madera sin tapadera mide 3m de largo, 2.5 m de ancho y 1 m de altura. Se arroja al agua y flota . Sí el cajón pesa 48 000 N, ¿ Cuánto de su altura queda bajo el agua? 

Atoms seldom exist as independent particles in nature a) as single particles, most atoms have low potential energy b) their electronegativity is much lower when they combine with other atoms c) atoms are more stable when they combine with other atoms d) neutral particles are rare