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.
Before you can begin to tackle the problem of the smell from your ducts you have to determine what might be causing it. Mold. One of the most common causes of a musty smell in ductwork is the presence of mold in an air conditioner. The mold will grow on both the condenser coils and in the collection pan. The ductwork. Another common issue could be with any of the ductwork that runs through a crawl space beneath the house.