Question : A light alloy consist of 70 % Al and 30%, Mg by mass, what will you expect its density to be ? density of Al = 2700kg / m3 density of mg - 1740 kg/m3 ​

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?