Air tends to flow from high pressure to low pressure. If the pressure in the lungs exceeds that pressure at the mouth (which is usually atmospheric pressure), then air will flow out of the lungs. During normal inhalation, the diaphragm muscle contracts, pushing the abdominal contents, but increasing the volume on the thoracic cavity (the chest). Since at first the volume of the lungs increases as it is pulled with the diaphragm, the intrathoracic pressure decreases, and air moves into the lungs.
If the pressure in the lungs were to increase relative to the air at the lips then air would move out. The elasticity of the lungs tends to make the lungs want to assume a smaller size (like the elasticity of a stretched rubber band). This force in addition to the force of expiratory muscles if they are being used will increase pressure in the lung (under normal circumstances this is basically intrathoracic pressure). However, the velocity of the flow of air is limited by airways resistance. [This is similar to V=IR from electricity voltage = current x resistance] In the case of the lung, the flow is proportional to the change in pressure (delta pressure intrathoracic pressure vs atmospheric pressure) and inversely proportional to the airways resistance. So resistance in the air passages with slow the flow of air out of the lung.
Now you might think that one could easily overcome airways (air passages) resistance's negative affect on flow by increasing the pressure in the lungs. Unfortunately this cannot be done without increasing the airways resistance too. Because as I try to squeeze air out of my alveoli with more pressure that pressure is transmitted throughout the lung and to my small airways that are compressible and thus if a bear were to hug me and try to squeeze air out of me faster this would also increase the airways resistance by narrowing some of the small airways, increasing resistance and decreasing flow.
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formula for the arc elasticity of demand
WOULD YOU LIKE TO EXPLAIN WHAT IS LARGE CROP YIELDS
explain why the price elasticity of demand varies along a demand curve, even if the demand curve is linear.
with example explain the concept of of elasticity of supply and interpretating the result graphical and descuse the relationship between price elasticity and suppliers total revenue
The concept of elasticity is a physical property because force can mutate a physical item and then when that force is removed and elastic object returns to its original form.æ Using elasticity to explain non physical phenonmena is a misnomer.
When you have less income you tend to consume less.
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price elasticity of demand is the degree of responsiveness of demand where by change in price of a commodity bring proportionate change in quantity demanded.
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show how the price elasticity of demand is graphically measured along a liner demand curve?
Please summarize the different ways to report the gain or loss on the various types of investments and explain how this treatment is in compliance with GAAP principles.