8. If a circuit has a fuel cell that pushes 12V, and a current that runs 6A, what will its resistance be?
a) 2.0 2
b) 2.52
c) 3.0 22
d) 3.522

2.0 ohms

Explanation:

Given that,

Voltage (V) = 12V

current (I) = 6A

resistance (R) = ?

Since, voltage, resistance and current are involved, apply the formula for ohms law:

V = I x R

Make R the subject formula

R = V / I

R = 12V / 6A

R = 2.0 ohms

Thus, the resistance will be 2.0 ohms.

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

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 =