A wave has a wavelength of 6 mm and a frequency of 9 hertz. What is its speed? what is the answer and units?

Answer:The speed is 54 mm/s, the units are mm/s.

Explanation:

1) dа ta:

a) λ = 6mm

b) f = 9 Hz = 9 s⁻¹

c) v = ?

2) Formula:

wave equation: v = f * λ

3) Solution:

v = 9 s⁻¹ * 6mm

v = 54 mm/s

The speed is 54 mm/s, the units are mm/s.