Is the following chemical reaction balanced?
2H202-H2O + O2
yes
no

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?