Which energy source generates electric energy by burning coal, natural gas or diesel?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

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 do you think car designers do if the damage caused by a crash test is too severe?