One thing to keep in mind is that waves are quite a bit different from the standard mechanical physics which you're probably used to. There are two ways to increase the energy in the system - increase the amplitude of the waves or increase the frequency of the wave (since power is defined as...
Not quite true, the surface displacement caused by the quake was ~10 m horizontally and a few meters vertically. I'll reference you to the USGS's website for more details:
USGS FAQ
The reason gaps usually do not appear is somewhat complicated, but I'll do my best. First of all, rocks are...
My parents use it to call me here in the Netherlands. Not too bad, although occasionally you will get busy signals during peak hours and lag in the communication. But the fact that you can use it to call cell phones without any additional fees makes it worth it, IMO.
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