What is the scale that measures the strength of an earthquake based on seismic waves and movement along a fault is called what?

[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a.light in water b.light in vacuum c.sound in air. d. sound in water

Explain why the rate of urbanisation is in the way it is between developed and undeveloped countries.

Heyi am new to are you all americans? ( just want to know , i don't mean any offence ) ?