1.1- Como puedes ver, Juan y Carlos no se han puesto de acuerdo, pero han propuesto una serie de alternativas:
a- Mencionamos una de ellas y seguidamente que podían haber hecho:

Which branches of natural science include the study of an organism that lived 10 million years ago

The ozone hole appears in antarctica during

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?