Two Sources of Waves, Call Them a and B, Send

question 69

Multiple Choice

Two sources of waves, call them A and B, send out waves across the surface of a lake. The waves from A have crests 1 cm high as measured from the normal undisturbed surface of the water. The waves from B are identical to those from A. How far is the water displaced at a point where a crest from A crosses a valley from B?

• A) 1 cm downward
• B) 1 cm upward
• C) 2 cm upward
• D) zero
• E) 2 cm downward

---

Definitions:

Federalist Papers

A collection of 85 articles and essays written by Alexander Hamilton, James Madison, and John Jay promoting the ratification of the United States Constitution in the late 1780s.

New Jersey Plan

A proposal at the Constitutional Convention favoring a unicameral legislature with equal representation for each state, regardless of population size.

Virginia Plan

A proposal by Virginia delegates for a bicameral legislative branch during the drafting of the United States Constitution in 1787.

Declaration of Independence

A foundational document adopted on July 4, 1776, in which the thirteen American colonies declared their independence from British rule.