Two bowling balls are rolling down lanes in a bowling alley. The kinetic energy of each bowling
ball depends on the bowling ball's mass and speed.
Bowling ball Mass (kg) Speed (m/s) Kinetic energy (1)
pink ball
48
orange ball
24
Compare the two bowling balls.
The pink ball's mass is
the orange ball's mass.
1/4
1/2
Equal to
2 times
4 times

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.