Liquids evaporate faster as they heat up and more particles have enough energy to break away. The particles need energy to overcome the attractions between them. ... Eventually even particles in the middle of the liquid form bubbles of gas in the liquid. At this point the liquid is boiling and turning to gas.
<span>A
sound wave is a pressure wave that results from the vibration of the particles
o the medium from the source. The motion of the particles in the medium is
parallel to the direction of the energy transport. The type of wave formed by a
sound wave is the longitudinal wave. </span>A longitudinal wave is
characterized by rarefactions. A longitudinal wave is a wave motion wherein the
particles in the wave medium are displaced parallel to transport. When motion
is detected from the source, the particle next to it vibrates from its rest
position and a progressive change in phase vibration is observed at each
particle within that wave. The result is that the energy is transported from
one region to the other. These combined motions result in the movement of
alternating regions of rarefaction in the direction of propagation.
La velocidad 
del objeto al tiempo 
es descrito por
donde
El objeto no tiene aceleración horizontal, pues 
y 
está determinado exactamente por su velocidad inicial en la dirección horizontal. En la dirección vertical, la gravedad es la única fuerza que actúa en el objeto, pues 
. Entonces, la velocidad después de 
satisface
Inmediatamente, vemos que 
y podemos encontrar que 
.
Su posicíon es descrita al tiempo por
con
Si la posición inicial del objeto es el origen, suponemos que 
, y además tenemos
Queremos determinar el máximo de 
. Encontramos que 
cuando 
.
