The length of time it takes for a planet to revolve around the sun is equivalent to which of the following?
a) the length of its decade
b) the length of its day
c) the length of its year
d) the length of its month

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.