If Mrs. Unger is familiar with the concept of scaffolding, she is most likely to apply which of the following strategies when her son, Phillip, is having difficulty learning the multiples of 5?a) teach him the multiples of 1 = 5, 2 = 10, and 3 = 5 and then let him try to master the next few multiples before teaching anything further
b) ask Phillip to observe one of his siblings reciting the multiples of 5 and then memorize what he hears
c) have Phillip focus on the multiples he does know so that he doesn't get discouraged
d) provide Phillip with all the multiples of 5 through the number 100 and see how many he can master

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

What causes the development of most clouds and precipitation in the atmosphere?