What do these two changes have in common? photosynthesis
making jam
Select all that apply.
Both are only physical changes.
Both are chemical changes.
Both are caused by heating,
Both are caused by cooling.

Which one of the following gases is not an important component of soil?

Supongamos que estás estudiando dos estrellas. ambas estrellas tienen la misma magnitud aparente, pero la estrella a tiene una magnitud absoluta mayor que la estrella b. ¿que puedes decir acerca de la distancia a la tierra de estas dos estrellas?

Determine the energy released per kilogram of fuel used. given mev per reaction, calculate energy in joules per kilogram of reactants. consider 1 mole of tritium plus 1 mole of deuterium to be a mole of “reactions” (total molar mass = 5 grams).