Air can be disinfected using
a. hepa fiters
b. ethylene oxide
c. uv light
d. a& c
e. b& c

C. UV light  

Explanation:

Some air purifiers use catalyzed ultraviolet light to disinfect the air. In oxidative processes with ultraviolet radiation (UV), high quality UV lamps, yield and radiation react with titanium that catalyzes the "burning" of microorganisms, odors and impurities difficult control by the usual systems.

Ultraviolet light eliminates the formation of mold in the air conditioning system, reduces the incidence of viruses and bacteria, preventing their multiplication and disinfects air that passes through the air conditioning system.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)