Radio waves are electromagnetic waves and as such travel at the speed of light. Waves emitted a century ago would be 100 hundred light years away. A light year is the distance light travels in one year. In one year light travels about 5.9 trillion miles. therefore the waves traveled about 590 trillion miles in a century.
It is a state with very little population and/or small land area
Answer:
A human community with high population density and low economic status will have the highest birthrates.
Explanation:
A is not correct because usually, these are populations in countries that are transitioning from one political to another political model, and these populations actually tend to decline, mostly because of immigration.
B is not correct because such populations tend to have low birthrates, often even below the bar for simple replacement of the population.
C is not correct because such populations tend to live in very bad conditions, so despite having relatively high birthrates, they stagnate in their growth.
D is correct because such populations have both the numbers needed and also live in more traditional societies, leading to very high birthrates, as can be seen with Nigeria, Ethiopia, Pakistan, Indonesia, etc.
The best and most correct answer among the choices provided by your question is the third choice.
The oceanic trenches<span> are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the </span>ocean<span> floor.</span>
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Answer:
Przyczyny marnowania żywności w Stanach Zjednoczonych i krajach wysoko rozwiniętych są następujące - zła pogoda, problemy z przetwarzaniem, nadprodukcja i niestabilne rynki powodują straty żywności na długo przed jej przybyciem do sklepu spożywczego, podczas gdy nadmierne kupowanie, złe planowanie i zamieszanie w zakresie etykiet i bezpieczeństwa przyczyniają się do marnowanie żywności w sklepach i domach.
