The one euro coin consists of a central disc of 3.80 g in a cupronickel alloy (75% copper by mass and 25% nickel). The crown, more yellow, is in nickel silver (alloy of copper, nickel and zinc).1 calculate the mass of copper and the mass of nickel in the central disk2 Determine the density of the central discdata (copper) = 9,00g. cm-3; (nickel) = 8,90g. cm-3; (zinc) =7,10g. cm-3we remind that for mixing the densities are added

Un jugador de beisbol batea un foul recto en el aire. la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

Much of the information taught in earth-space science would not be available if it weren’t for our remote sensing abilities. explain two ways our remote sensing strategies contribute to our knowledge of these topics.

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.