Two boxes of masses M1 and M2 are placed next to each other, in contact, on a floor with a smooth, horizontal surface. Box M1 is on the left of Box M2. A constant horizontal force, F, pushes box M1 to the right. What is the acceleration of the two boxes? 1: a=F/(m1+m2)
2: a=F/m2
3: a=F(m1-m2)
4: a=F/(m1 times m2)
5: a=F/m1

Please help

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr

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 =