A block is released from rest, at a height h, and allowed to slide down an inclined plane.
There is friction on the plane. At the bottom
of the plane, there is a spring that the block
will compress. After compressing the spring,
the block will slide up the plane to some maxi-
mum height, ha, after which it will again slide
back down.
How much work is done on the block be-
tween its release at height h and its ascent to
its next maximum height?

positive reinforcement? ?

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 =

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j