The methods for calculating evapotranspiration from meteorological data require various climatological and physical parameters. Some of the data are measured directly in weather stations. Other parameters are related to commonly measured data and can be derived with the help of a direct or empirical relationship. This chapter discusses the source, measurement and computation of all data required for the calculation of the reference evapotranspiration by means of the FAO Penman-Monteith method. Different examples illustrate the various calculation procedures. Appropriate procedures for estimating missing data are also provided.
Meteorological data can be expressed in several units. Conversion factors between various units and standard S. I. units are given in Annex 1. Climatic parameters, calculated by means of the equations presented in this chapter are tabulated and displayed for different meteorological conditions in Annex 2. Only the standardized relationships are presented in this chapter. The background of certain relationships and more information about certain procedures are given in Annex 3. Annexes 4, 5 and 6 list procedures for the statistical analysis, assessment, correction and completion of partial or missing weather data.
It looks like there are choices. If I don't get this the way your choices are written please leave a note under my answer.
total weight = w
w = n + bp + t
t = 70% * w <<<< One possible answer
t = (70/100)*W = 0.7*W Either one of these could be an answer.
n = 4 pounds
bp = 2 pounds
w = 4 + 2 + t Substitute for t
W = 6 + (70%W)
W = 6 + (70/100) * W
W = 6 + 0.7*W Subtract 0.7W from both sides.
W - 0.7W = 6
0.3W = 6 Divide by 0.3
W = 6/0.3
W = 20
t = (70/100*20 = 14 <<<< Could be an answer.
Please put the possible choices up soon. The mods can be very touchy about uncertain answers. They are correct to delete such questions.
Answer:
All of them work just depends on which coordinate you use.
Step-by-step explanation:
