Question

Which of these descriptions of units is FALSE? The partial pressure of a gas like CO2 in air divided by the total pressure of the air is the same as the concentration of the gas in the air. 40 Pa of CO2/100 kPa of air 400 micromol of CO2/ mol air Fun fact: 8 mm day of evapotranspiration is equivalent to 8L of water m ground area day. If you can work out why, then congratulations you are as nerdy as the professor! For PAR or PPFD the units are micromol m2s of energy For solar radiation: W m2-Jm 2s1 All the options are true, except that you should know that PAR and PPFD are based upon photons, not energy. As long as the photon has the energy of hatwaan 400 2nd 700nm.than it .can haucad

Answer 1

Answers Page No-o (A) (B) (c) Palse True Tree True Because (A) Mole fraction = x(0,= p*/ - where pt = vapour pressure of pure co gas p= its partial pressure in mixture. Total = sum of partial pressures of all gases in the mixture. (B) The evapotranspiration late in mm per unit time. I t is the amount of watu lost from a surface in the units of watu depth on the surface ... 8 mm day-t of evapo toangpilation is comivalent to 8L of water mit gourd area day-1 - As one hectare area = 10000m - I mm = 0.0olm Lois of imm of watu = loss ofions of watu / hectare 1 mm day 1 = como ha-leay - 8 mm day of evapotranspiration - 8.0m /10000 nday - 1 = 0.008 m3/m day- -0.008*1000L/m day 1 - 8Lm-2day-

Page No - 0 (C) PARI photosynthetically active radiation is measured as HICRO mol photong mas? It is same as photosynthetic photon flux dengity / PPFD. (0) I radiance = watt Imt - js-Im-2. so "A" is false