In this problem, we are required to apply concepts regarding wave equations.

**1.**

The equation of a wave travelling in the positive x-direction is:

A wave on a string is described by D(x,t) = (2.0cm)•sin[2π(x/(8.4m) + t/(0.24s) +1)], where x is in m and t is in s.

1. In what direction is this wave traveling?

a. in the positive *x*-direction

b. in the negative *x*-direction

c. in other direction

2. What is the wave speed?

3. What is the frequency?

4. What is the wave number?

5. At t = 0.84s, what is the displacement of the string at x = 4.9 m?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Waves on a String concept. You can view video lessons to learn Waves on a String. Or if you need more Waves on a String practice, you can also practice Waves on a String practice problems.