Dylan has two cubes of iron. The larger cube has twice the mass of the smaller cube. He measures the smaller cube. It’s destiny is 7.87 g/cm. What’s the larger cube’s volume?

Density = mass/volume, volume = mass/density.

Since the mass of the small cube equals 20 and the mass of the large cube is double it would be 40.

Now plug in volume = 40 g/(7.87 g/cm^3).
giving you a volume 5.08 cm^3

B. nuclear reactions could first occur.