If the coast-to-coast distance is about 2900 miles, it will take about ...
... (2900 mi)/(186000 mi/s) ≈ 15.6 ms
for the signal to travel coast-to-coast at light speed.
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There are time delays due to the amplifiers and repeaters required in the path, and due to the fact that the signals don't actually travel at the speed of light in a wire.
A test of internet speed between Seattle and Washington, DC shows a round-trip time of about 87 ms when traffic is light. Modern communication channels tend to be faster than the telegraph (especially when measured in words per minute).
A Mummy's DNA May Help Solve The Mystery Of The Origins Of Smallpox
The surprise find of smallpox DNA in a child mummy from the 17th century could help scientists start to trace the mysterious history of this notorious virus.
Smallpox currently only exists in secure freezers, after a global vaccination campaign eradicated the virus in the late 1970s. But much about this killer remains unknown, including its origins.
Answer:
The border between two tectonic plates is called a boundary. All the tectonic plates are constantly moving — very slowly — around the planet, but in many different directions. Some are moving toward each other, some are moving apart, and some are sliding past each other
Explanation:
The best and most correct answer among the choices provided by the question is the second choice "downtown areas"
An urban heat island<span> (UHI) is an </span>urban<span> area or metropolitan area that is significantly warmer than its surrounding rural areas due to human activities.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
St. Lawrence River, the Great Plains, and the Rocky Mountains are major landforms that both Canada and the United States of America share. You could also say the great lakes. Hope I helped. : )
