Suppose You Watch a Leaf Bobbing Up and Down as Ripples

question 44

Multiple Choice

Suppose you watch a leaf bobbing up and down as ripples pass it by in a pond. You notice that it does two full up and down bobs each second. Which statement is true of the ripples on the pond?

• A) They have a frequency of 2 hertz.
• B) They have a frequency of 4 hertz.
• C) We can calculate the wavelength of the ripples from their frequency.
• D) They have a wavelength of two cycles per second.

---

Definitions:

Micro Expression

Brief, involuntary facial expressions that reveal true emotions, often occurring when a person is trying to conceal their feelings.

Involuntary Expression

Unconscious facial or bodily movements that convey emotions or reactions, not controlled voluntarily.

James-Lange Theory

A theory of emotion proposing that emotions result from the perception of bodily reactions to stimuli, implying that physiological arousal precedes emotional experience.

Autonomic Changes

Adjustments in the autonomic nervous system that regulate bodily functions such as heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal.