# Waves, Sound and Light: Wave Basics

## Wave Basics: Audio Guided Solution

#### Problem 14:

A wave is traveling in a rope. The diagram below represents a snapshot of the rope at a particular instant in time.

Determine the number of wavelengths which is equal to the horizontal distance between points …
a. … C and E on the rope.
b. … C and K on the rope.
c. … A and J on the rope.
d. … B and F on the rope.
e. … D and H on the rope.
f. … E and I on the rope.

## Audio Guided Solution

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## Habits of an Effective Problem Solver

• Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
• Identify the known and unknown quantities and record in an organized manner, often times they can be recorded on the diagram itself. Equate given values to the symbols used to represent the corresponding quantity (e.g., v = 12.8 m/s, λ = 4.52 m, f = ???).
• Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
• Identify the appropriate formula(s) to use.
• Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.