Energy is changed from one form to another with no net loss or gain.
a) sometimes true
b) always false
c) always true

The correct answer is C) Always true

Explanation:

The law of conservation of energy states that energy cannot be created or destroyed. That implies that the total energy of a isolated system is constant. The energy can change from one form to another with not net loss or gain. For example, in a washing machine, the electrical energy supplied is transformed to mechanical energy which moves the tub. This law constitutes a fundamental principle of thermodynamics and physics, so it is always true.

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

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 =