What is the difference in arrival times for a P wave and S wave that have traveled 4000 km?

What role did the waterways of europe play in development of europe's economy

[ou.01]which of these is the most likely use of an electromagnetic wave which has wavelength shorter than microwaves but longer than visible light? o heat food safely o neat food safely o take images of bones and teeth o transmit radio and cellular phone signals o take images of bones and teeth o transmit radio and cellular phone signals o detect the location of objects which emit heat

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market