On the Basis of the Data Presented Below, Calculate the Time

question 9

Multiple Choice

On the basis of the data presented below, calculate the time constant.
$\bullet$ Tidal volume (VT) , 600 mL
$\bullet$ Respiratory rate (RR) , 12 breaths per minute
$\bullet$ Lung compliance (C) , 0.2 L/cm H₂O
$\bullet$ Airway resistance (Raw) , 2.5 cm H₂O/L/second
$\bullet$ Peak inspiratory pressure (PIP) , 30 cm H₂O
$\bullet$ Inspiratory time (TI) , 2 seconds
$\bullet$ Expiratory time (TE) , 1 second

• A) 4.5 seconds
• B) 3.0 seconds
• C) 0.5 second
• D) 0.1 second

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Definitions:

Marginal Cost

The expenditure associated with creating one more unit of a good or service.

Market Equilibrium

A situation in which the supply of an item is exactly equal to its demand, leading to a stable price for the item in the marketplace.

Negative Externality

A cost suffered by a third party due to an economic transaction that they were not involved in, often without compensation.

Externalities

External impacts of an economic activity on unrelated third parties, which can be either positive or negative.