Study the position-time graph for a bicycle.

The four giant gas points that are made primarily of lightweight elements are

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

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