Question

37. If the following wave has a frequency of 30 Hz, with a 1.5 m line what is its speed?

A. 20 m/s
B. 30 m/s
C. 45 m/s
D. 50 m/s

Answer 1

The wave with a 30 Hz frequency and 1.5 m wavelength has a speed of 45 m/s, making the correct answer C.

The speed of a wave is given by the formula:

`\[ \text{Speed} = \text{Frequency} * \text{Wavelength} \]`

where

- Speed is in meters per second (m/s),

- Frequency is in hertz (Hz), and

- Wavelength is in meters (m).

In this case, the frequency is 30 Hz, and the wavelength is 1.5 m. Plug these values into the formula:

`\[ \text{Speed} = 30 \, \text{Hz} * 1.5 \, \text{m} \]`

`\[ \text{Speed} = 45 \, \text{m/s} \]`

Therefore, the correct answer is: C. 45 m/s