The waves in some amusement park wave pools are controlled by regularly spaced bursts of air. Chang-
ing the timing and strength of these air bursts also
changes the characteristics of the waves that result.
Predict List and describe four wave
characteristics. Which characteristic(s) do you
think would change if the air bursts were
stronger? Which would change if more air bursts
came in a shorter amount of time? Explain.

Ways that industry and agriculture use physical properties to separate substances

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to