There are simply fans (usually containing a means of heat in northern climes) which introduce outside air into a space. Typically, to compensate for air lost due to exhaust in areas such as kitchens, locker rooms, manufacturing areas etc.
hydrosphere
With pictures of your work. if freelance, have a few references provided
science and creativity make up an engineer.
The temperature of the air is a measure of the degree of molecular movement of all the Nitrogen and Oxygen molecules that largely make up air. Technically, it is determined by getting the average speed of a body's molecules.
unwanted,harmful and dirty
the vents work because of the heat which can make the hot air balloon go up
the vents work because of the heat which can make the hot air balloon go up
The tiny units that make up bone are called osteons.
The smaller units that make up fats are called TRIGLYCERIDE
Phonemes are the smallest units of sound that make up a word. They are the basic units of sound in a language that distinguish one word from another.
cubed units
The simplest units are called nucleotides.
Central air conditioning units can freeze up due to restricted airflow, low refrigerant levels, or issues with the unit's components such as the coils or filters.
it makes up the respiratory system.
atoms
Cells.
10 formula units