Generating electricity directly from the sun’s radiation is known as ____________________ power generation.
Fill in the blank(s) with the appropriate word(s).
PV
photovoltaic
photovoltaic (PV)
photovoltaic or PV
PV or photovoltaic
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An ideal gas, initially at 30°C and 100 kPa, undergoes the following cyclic processes in a closed system:
What will be an ideal response?
(a) In mechanically reversible processes, it is first compressed adiabatically to 500 kPa, then cooled at a constant pressure of 500 kPa to 30°C, and finally expanded isothermally to its original state.
(b) The cycle traverses exactly the same changes of state, but each step is irreversible with an efficiency of 80% compared with the corresponding mechanically reversible process. Note: The initial step can no longer be adiabatic.
Calculate Q, W, ?U, and ?H for each step of the process and for the cycle. Take 
and 
The element ____ is necessary in the creation of the starches and sugars used by the plant as energy
Fill in the blank(s) with correct word
What colors of light most actively stimulate photosynthesis?
What will be an ideal response?
Primary advantages of direct-reading, mass flow meters such as the Coriolis meter include __________.
A. non-invasive design B. immunity to changes in product density and other fluid properties C. immunity to changes in fluid pressure and temperature D. excellent accuracy E. all of the above