¿Cómo decides en los problemas de campo magnético si dibujas x o puntos cuando te piden representarlo?

Observations show that interstellar clouds can have almost any shape and

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging