A ball accelerates down a 103cm long ramp, starting at a speed of 1.70m/s. If it takes 0.393 seconds to reach the bottom of the ramp, it will be moving at a spped of __ m/s when it gets there. I have 1.92m/s am I right?

correct it is c.) b b

wavelength divides in half and speed stays the same.

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 =