Answer:
The main difference between them is that; Wegener's Continental Drift postulates that earth was made up of a single continent, while the theory of Plate Tectonics states that earth's surface is broken into numbers of shifting plates or slabs.
Explanation:
Wegener's Continental Drift was a theory set forth by <em>Alfred Wegener in 1912. </em>He explained how continents shift positions on earth's surface. This movement happened over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.
While on the other hand, the Theory of Plate Tectonics is the theory that the outer shell of earth is divided into several plates that glide over the mantle(the rocky inner layer above the core). The plates act like a hard and rigid shell compared to Earth's mantle.
Can’t have more than a certain amount
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).
It is called Unitary
Hope this helps!
<span> What substance was responsible for a major ozone depletion in the 1900s? </span>
<span>In the 1920s, CFCs were invented and widely used because they were not too expensive, and were inflammable. By the 1990s, they were banned because they depleted ozone, and the only place Nature could destroy them was the intense solar radiation in the ozone layer. </span>
