An engineer is designing a runway for an airport. Of the planes that will use this airport, the lowest acceleration rate is likely to be 4 m/s^2. The
takeoff speed of this plane will be 80 m/s. Assuming this is the minimum
acceleration, what is the minimum allowed length for the runway? (vf^2 =
vi^2 + 2a(df-di)) *

Identify two factors that determine the rate of stream erosion

1) sections 1, 2, and 10 are significant primarily because they suggest the likelihood that a) widow wycherly is actually the woman in the full-length portrait. b) dr. heidegger wants to include his guests in an experiment with the water. c) dr. heidegger plans to drink some of the water from the vase and needs witnesses. d) the guests will be asked to witness dr. heidegger's transformation when he drinks the water.

Which example has gravitational potential energy? a. a horse slowing down from a run b. an apple about to fall from a tree branch c. a bicycle being pedaled down a horizontal path d. beaker sitting on the floor