A boy weighing 150 n goes (a) up and (b) down a flight of stairs. The vertical distance between the floors is 5. 5 m. How much work is done by gravity (a and b)?.

4sentences over a chronicle of a teen killer

The graph shows the populations of two species in a particular region over two decades. based on the graph, what can you conclude about the relationship between the two species? a. the two species have a parasitic relationship. b. the two species are mutualistic in nature. c. the two species exhibit commensalism. d. the two species have a prey-predator relationship. e. the two species have a familial relationship.

It takes longer to fly an airplane against a with it