<span>muggy</span>
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The Sydney opera house is in Australia (:
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).
Answer: the answer is Chemical Energy pls mark me BRAINLEST plzz ;)
Explanation: Many living and non-living things make sounds. 9) Energy is carried by light. The sun makes quite a lot of light which comes to Earth (it has lots of thermal energy too). The sun gets its energy from the nuclear fusion of hydrogen to make helium atoms.