A Supersonic Waterfall : There were periods of time in the p…

A Supersonic Waterfall : There were periods of time in the past when a massive saltwater waterfall occurred at the Strait of Gibraltar. The water falling in this waterfall reached supersonic speeds; that is, by the time it hit the bottom, the water reached speeds larger than the speed of sound.Ignoring air resistance, what was the height necessary for the water to reach the speed of sound? Assume the speed of sound is 3.4 x 102 m/s.

[MidA] Fredrick’s mother reports that he often cries and hid…

[MidA] Fredrick’s mother reports that he often cries and hides when told it is time for bed most nights. The behavior analyst observes Fredrick just before bedtime for several days and graphs the data. Next, she instructs Fredrick’s parents to implement a visual-schedule intervention, which provides their son with a clear sequence of activities before bedtime. Fredrick’s parents report that they are happy with the outcome of the intervention. Which basic operation of the science of behavior analysis is missing from this example?