<span>the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.</span>
Answer: this cool and all but where are the answer choices?
Explanation:
Answer:
A respiratory tract infection affects the respiratory system, the part of your body responsible for breathing. These infections can affect your sinuses, throat, lungs or airways. There are two types of respiratory infections:
Upper respiratory infections.
Lower respiratory infections.
Explanation:
A respiratory tract infection affects the respiratory system, the part of your body responsible for breathing. These infections can affect your sinuses, throat, lungs or airways. There are two types of respiratory infections:
Upper respiratory infections.
Lower respiratory infections.
