SITUACIÓN CAMBIO DE ESTADO
Después de una ducha con agua
caliente en el espejo se ven gotilas
de agua que escurren.

Cuando dejamos un trozo de
chocolate al sol, se derrite,

Si se coloca una taza con agua
caliente cerca de una ventana,
aparecen gotitas de agua en el
viario
Si se deja una tetera con agua al
fuego durante mucho tiempo, sale
vapor de la tetera.

Después de unas horas de estar al sol.
la ropa húmeda se seca.​

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

What can be found in the ionosphere