If the average amount of earthquakes with a magnitude of 4 or higher was 10,000 per year, approximately how many would have registered as 6 or higher

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these