Hi !!
<u>tú subes = 2nd person sing. presente</u>
<u>Subir </u><em>presente indicativo</em>
(yo) subo
(tú) subes
(él/ella/Ud) sube
nosotros) subemos
(vosotros) subís
(ellos/ellas/Uds) suben
Answer:
No estoy preocupado. Mi hermano es muy joven. En unos años va a entender que uno necesita trabajar. ___Es___ necesario trabajar.
Explanation:
Answer:
A. Estarán estudiando
Explanation:
El próximo año ellos
estarán estudiando
comunicación social porque quieren ser periodistas.
Answer:
The half life of an isotope is the time that an element take to reduce the half of the mass.
Explanation:
So for example,in the case of carbon 14, one gram takes 5730 years to reduce to 0.5 g, and then, it takes another 5730 years to be reduced to 0.250 g and so and so.
So depending the mass of the sample that you have, for example, a bone that weights 15 g, it will take 5730 years to have a mass of 7.5 g, and then 11, 460 years to have a mass of 3.75 g, and then 17,190 years to have a mass of 1.875 g, and so, and so.
Hope this info is useful.
