A sinusoidal wave is described by the wavefunction y(x, t) = 0.03 sin⁡(5πt - πx). Which of the following statements is true?The wave has a speed of 0.2 m/s and propagates in the positive x-directionThe wave has a frequency of 3 Hz and propagates in the positive x-directionThe wave has a frequency of 3 Hz and propagates in the negative x-directionThe wave has a speed of 5 m/s and propagates in the positive x-directionThe wave has a wavelength of 2 m and propagates in the negative x-direction

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 =

moisture is lackin, and organic acids are scarce.

radial fractures in a piece of glass look most like which of the following?

a. spokes of a wheel

b. a circle

c. a zig zag

d. none of the above

the correct answer is a. spokes of a wheel

hope this (: