Dé 2 razones por las que a un automovilista menor de 21 años se le
puede permitir conducir después de las
restricciones de tiempo.

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.

ice to water 1 water to vapour 2 latent heat

this is poiselle's equation from fluid mechanic in physics. mech eng

gas and liquid