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

which three statements are true about all alloys?

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =