In-car temperature is controlled in a variable displacement compressor system by varying the capacity of the , not by cycling the on and off.

In-car temperature is controlled in a variable displacement compressor system by varying the capacity of the refrigeration not by cycling the compressor on and off.

Explanation:

A Variable Displacement Compressor (VDC) works in a separate and rather more efficient manner than the fixed displacement compressor (FDC). The VDC automatically regulates the cooling effect of the refrigerator by changing its pumping capacity by means of a "wobbling piston" system.

During times of peak load, the refrigeration pumping capacity is increased, delivering a large flow rate of refrigerant, thus giving a high refrigerating effect. The reverse happens during times of load refrigeration load.

The fixed compressor tries to vary the temperature of the car by simply switching off the compressor, and turning it on during times of low and peak loads.

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 =