Answer:
Option D
Explanation:
Discovering microwaves would be pure science. Using them in a constructive way would be applied science.
it's the last one because it's depended on the rock layers
I need more details so I can answer it for you
The density of magnesium is 1.7/cm3, and the density of iron is 7.9g/cm3. Consider a block of iron with a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?