Obviously, we canât directly measure the size of the universe but cosmologists have various models that suggest how big it ought to be. For example, one line of thinking is that if the universe expanded at the speed of light during inflation, then it ought to be 10^23 times bigger than the visible universe.
If you smell burning from your AC unit, you probably have an electrical problem. The burning smell can come from either a blower motor that overheated or a mechanical failure of some sort. This is due to the build up heat of plastic insulation on wires, causing melting and the burning smell in your unit. Also, if plastic, rubber, or other objects get caught in your ductwork, this can cause a burning smell. Even dirty air filters can overheat your AC unit, creating a burning smell.
Clean every surface of an air conditioner to eliminate black mold. Air conditioner vents can be breeding grounds for black mold. Condensation forms in the coils and ducts as cool air circulates through the system, creating a habitat for moisture-loving mold. Black mold can cause severe respiratory symptoms, particularly in people who are allergic to mold. After you clean your air conditioner vents, inspect walls and insulation to find the source of the black mold infestation.