Q. Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 250 m/s^2 for 20 {rm ms}, then travels at constant speed for another 30 {rm ms}.
During this total time of 50 {rm ms}, 1/20 of a second, how far does the tongue reach?
Q. An opera singer in a convertible sings a note at 600 Hz while cruising down the highway at 90;{rm km}/{rm hr} .
What is the frequency heard by a person standing beside the road in front of the car?