Building assemblies are generally more vapor permeable than air permeable because
A) vapor has only water molecules, while air is a mixture of nitrogen and several other gases.
B) vapor pressure differential between the inside and the outside air is much greater than the corresponding air pressure differential.
C) vapor is only a small part of the air-vapor mixture.
D) vapor is not really a gas.
E) vapor molecules are heavier than air molecules.
B) vapor pressure differential between the inside and the outside air is much greater than the corresponding air pressure differential.
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The evaporator fan motor is controlled by an indoor fan relay controlled by the ____________________.
Fill in the blank(s) with the appropriate word(s).
____________________ is stored in pressurized tanks and is used to inflate balloons that rise and float in the air
Fill in the blank(s) with correct word
The hormone oxytocin
A) reduces uterine contractions. B) is involved in the milk "letdown" reflex. C) regulates blood pressure. D) governs the ovarian cycle. E) stimulates melanocytes in the skin.
Three transportation projects have been proposed to increase the safety in and around a residential neighborhood. Each project consists of upgrading existing street signing to highly retroreflective sheeting to increase visibility. The following table shows the initial construction costs, annual operating costs, useful life of the sheeting, and the salvage values for each alternative. Assume that the discount rate is 10%. Calculate the present worth for each alternative and determine the preferred project based on the economic criteria.
What will be an ideal response?