A high school bus travels 240 km in 6.0 h. What is its average speed for the trip? (in km/h).

What is the role of the ocular lens?

How have the competing explanations' experiments on atoms affected the development of the atomic model?

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