2points
many cell phones vibrate when they receive a call. what
energy transformation is happening to make the phone
vibrate?
o a. electrical energy to kinetic energy
o b. electrical energy to light energy
o c. thermal energy to elastic energy
ht
o d. light energy to chemical energy
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the closer the planet is to the sun, the larger the gravity

option number c is the right answer.

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 =