If a wave has a frequency of 0.4 Hz and a wavelength of 15 m, what is its
velocity?

6.0m/s

Explanation:

Given that:

Wavelength (λ)= 15m

Frequency F = 0.4Hz

Velocity V = ?

The wave velocity is the distance covered by the wave in one second. It is measured in metres per second, and represented by the symbol V.

So, apply the formula V = F λ

V = 0.4Hz x 15m

V = 6.0m/s

Thus, the velocity of the wave is 6.0m/s

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the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.