Because tropical moist forests are used for agricultural, the thin soil cannot support continuous cropping, while deciduous forests can regrow quickly.
Producido a partir de un experimento de laboratorio ido mal, las tortugas adolescentes Leonardo, Michelangelo, Donatello y Raphael viven en las alcantarillas bajo Nueva York. Aunque su sensei roedor, Splinter, aconseja no mostrarse sobre el suelo, los hermanos amantes de la justicia y que comen pizza no pueden permanecer ociosos mientras el malvado Shredder y sus secuaces aterrorizan a la ciudad. Con ayuda de la intrépida reportera April O'Neil (Megan Fox) y su camarógrafo (Will Arnett), las Tortugas salieron a salvar a Nueva York.
espero que esto ayude :)
I’m not sure about the first one, but I know that in order for a substance to be in a plasma stage it must be hot, so I would say C) for the second question :)
Answer:
302.05 Hz
228.37433 Hz
Explanation:
v = Speed of sound in air = 344 m/s
= Speed of train relative to the ground in a direction opposite to the first train and approaching it = 18 m/s
= Speed of train relative to the ground in still air = 30 m/s
The frequency of approach is given by
The frequency of approach is 302.05 Hz
The frequency of recede is given by
The frequency of recede is 228.37433 Hz