A guitar string vibrates with a frequency of 320 Hz. If the wavelength of the vibration is 0.13
meters what is the speed of the wave

speed = 41.6 m/ s

Explanation: Given that the

frequency F = 320 Hz.

wavelength = 0.13meters

The speed of a wave is the product of frequency and wavelength of the wave

V = F λ

Where

V =  wave speed (m/s)

λ (m) = wavelength.

F = frequency (Hz).

Using the formula above gives:

Speed = 320 × 0.13

Speed = 41.6 m/s

that would be because of both gravity and friction. so     c

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me