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Leto [7]
4 years ago
8

Approximately how long would it take a telegraph signal to cross the united states from the east coast to the west coast? (teleg

raph signals travel at about the speed of light.)
Geography
1 answer:
castortr0y [4]4 years ago
6 0

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.

_____

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).

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Explosive magma usually has _____.
koban [17]

Answer:

If the magma has high gas content and high viscosity, the gas will expand in an explosive fashion and break the liquid into clots that fly through the air and cool along their path through the atmosphere. Alternatively it blast out solid pieces of rock that once formed the volcanic edifice.

Explanation:

8 0
2 years ago
Which of the following is used for calculation of the Human Development Index? crime domestic labor O resource use gross domesti
den301095 [7]

Answer:

<u>Life expectancy index, Education index, Literacy index, Income index all the countries are ranked based on these parameters</u>.

Explanation:

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  • The HDI shows low human development scores from 0.0 to 0.5. The medium human development scores between 0.5 and 0.8. High human development for HDI scores ranges from 0.8 and 1.0.
  • Though there are limiting factors of HDI as it does not take into account the qualitative factors and cultural identity into considerations, As others have suggested the HDI should be more human-centered ranging from gender to environmental biodiversity.
8 0
3 years ago
Large- scale floring of rocks during the process if mountain biulding is characteristick of ____ metamorphism
Lunna [17]
<h2>Answer</h2>

The answer is Regional Metamorphism

<h2>Explanation</h2>

In the metamorphism, the rock is altered with the effects of natural agencies. Regional Metamorphism is the type of metamorphism, where the rocks are also changes with the interaction of high pressure or heat on the open wide area instead of contact with the magma. These rocks are also changes with the overburden of plate tectonics. In this question, the large-scale folding of rocks represents Regional Metamorphism.

6 0
3 years ago
ME AND AIRIA ARE GONNA TEXT ON THIS KK.
madreJ [45]

Answer:

Luke delete this one too you missed it

Explanation:

i had to answer it bc there was no more room to text...

6 0
2 years ago
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What is the definition of a common market?
snow_tiger [21]
No barriers to trade from nation to nation
5 0
4 years ago
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