This was astrolabe; an instrument to predict the position of the stars, that could also be used to predict t one's position. The compass was invented in China.
Answer: Celtic Sea
Fraggle Rock is a children's puppet television series created by Jim Henson.
Exterior footage of Fraggle Rock was filmed at St. Anthony's Lighthouse located near Falmouth in Cornwall. This means that the lighthouse is located near the Celtic Sea. This sea is an area of the Atlantic Ocean off the south coast of Ireland. Its limits are unclear, but are often considered to be: Saint George's Channel, Bristol Channel, the English Channel and the Bay of Biscay. The name is mostly used by marine biologists, oceanographers and the oil industry.
<u><em>There are 2 types of economies,</em></u>
<u><em>---> Formal economies ( Eg: Capitalism, Socialism etc)</em></u>
<u><em>----> Informal economies ( Eg : Underground Economy)</em></u>
Answer:
91%
Explanation:
As per the given pie chart, Non-Renewable sources include Coal, Nuclear power, Natural gas, and Petroleum.
Percentage of Coal = 52%
Percentage of Nuclear power = 16%
Percentage of natural gas = 20%
Percentage of Petroleum = 3%
∵ Total percentage of non-renewable sources of energy = Coal + nuclear power + natural gas + petroleum
= 52% + 16% + 20% + 3%
= 91%
While the other 9% is renewable energy including 7% Hydropower and 2% of geothermal, wind, solar energy, etc.
Thus, 91 % is the combined percentage of US energy produced by all of the nonrenewable sources.
The answer to this question is B. Elevators
One of the reason why skyscrapers were not popular before the invention of elevators was that it took too much energy to move from the groud floor to the upper floor with the stairs alone.
After the invention of elevators, we eliminate this problem and people could move from ground floor to upper floor with only little effort.
