Derek is riding his bike 10 mph. He takes 20 seconds to reach 15 mph. What is his acceleration? 0.25 m/s/s 1.25 m/s/s 4 m/s/s cannot be determined

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

Explain why the rate of urbanisation is in the way it is between developed and undeveloped countries.

All of the following occurred due to the invention of the railroad except