Need this answer asap! niagara falls has an average height of 45 m. the sir adam beck power stations i and ii together generate up to 1926 mw (megawatts, or 10^6 w). assuming that 1 litre of water has a mass of 1 kg, what volume of water is required to go over the falls every second to generate this much electricity. need steps too! !

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

What organization and environment is described above?

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?