True if the map shows a scale.
<h2>
The End of Trans-Saharan Trade Routes:</h2>
Explanation:
The factors that led to the end of trans-Saharan trade routes are:
- Civil unrest due to collapse of the Songhay Empire, the Timbuktu, by the Morracans in 1591
- The extreme desert conditions like extreme climates, excessive heat, lack of water and food etc made the travel logistics very tough. This made people opt for other transport systems
- Huge advancements made in maritime travel
- Exploration of West African trade routes
- Economic, political and social changes which led to the end of trans-Saharan trade routes
<u>Answer:</u>
<em>Series of topographic maps in chronological order.
</em>
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<u>Explanation:</u>
If we see the map in a chronological order, then that gives us the rough idea about the flow, angle and area of the river. A detailed study of the topographic map gives us the idea about the direction in which the river has flown over the years. Based on this map we can successfully form a model which will give us a future position and flow pattern of the river. So in the light of the above facts the use of the topographical maps in the chronological order is the most appropriate tool for mapping the future course of the river.
Answer:
About 16 times the energy of the second.
Explanation:
This can be explained thanks to the Stefan-Boltzmann law, which relates temperature directly to the amount of energy released by an object.
With this law in mind, the total energy radiated during 1 second from 1 square meter of any object, equals <em>a constant </em>(5.670374419 × 10−8 watt per meter2 per K4) times the temperature raised to the fourth power. the equation is:
E = σT4
Since the first star is twice as hot as the second, then the star won't produce twice the energy, but 16 times the energy due to the Stefan-Boltzmann constant. It's also important to know that this law only applies to blackbodies.
