Acertain particle is at rest with respect to you. assuming that you measure its mass to be 1 g, what is its energy? 1 ev = 1.6 x 10^-19 j. answer in units of mev.

5.625×10²⁶ MeV

Explanation:

m = Mass of particle = 1 g = 0.001 kg

c = Speed of light = 3×10⁸ m/s

Einstein's equation

E = mc²

⇒E = 0.001×(3×10⁸)²

⇒E = 9×10¹³ J

1 eV = 1.6×10⁻¹⁹ J

So,

Converting to MeV

1 MeV = 10⁶ eV

So,

The energy of the particle is 5.625×10²⁶ MeV.

answer///terminator or twilight zone;

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 =