Why was Peter the Great able to complete so many projects and accomplish so much

Peter the Great modernized Russia—which, at the start of his rule, had greatly lagged behind the Western countries—and transformed it into a major power. Through his numerous reforms, Russia made incredible progress in the development of its economy and trade, education, science and culture, and foreign policy.

Peter implemented sweeping reforms aimed at modernizing Russia. Heavily influenced by his advisers from Western Europe, he reorganized the Russian army along modern lines and dreamed of making Russia a maritime power. ... The mission failed, as Europe was at the time preoccupied with the question of the Spanish succession.

He improved the country's offensive and defensive capabilities by establishing a navy and making improvements to the existing army. He greatly improved access to education for his people. He also improved trade due to the considerable expansion of the Russian territory.

Sonar is an application of the doppler effect used by submarines.  this test was on k12.

The answer is sub saharen africa