For this lab there are two different animations to view. You can view each of the animations by clicking on "Animation 1" or "Animation 2" below the animator box. In both animations a force is being applied by a finger on a 2kg block pushing against the wall; however the force applied by the finger is different in each case. The coefficient of static and kinetic friction between the block and the wall is .5 and .4 respectively. 1) The net force in the horizontal direction on the block in Animation 1 is:

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

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 =

snell's law

refractve index = sin incidence / sin refraction