Aperson who rules in place of a ruler who is either too young or too ill to govern saint justinian theodora regent mosaic

How did the industrial revolution give an advantage to industrialized european nations over non-industriallized nations?

What happened in the tinker v des monies? and why is it important what happened in the hazlewood v. kuhlmeier? why is it important?

Explain how concentrating solar power (csp) technology works