Final answer:
The spring constant of the guitar string cannot be calculated without additional information. Frequency = 20.0 Hz
Step-by-step explanation:
The spring constant of a guitar string can be found using the formula:
k = (4 * frequency^2 * mass) / (length * wavelength^2)
In this question, the given values are:
Mass = 0.045 kg
Frequency = 20.0 Hz
To find the spring constant, we need to know the length of the string and the wavelength of the wave. These values are not provided, so we cannot calculate the spring constant with the given information.