Account for Water in a Simple Model - Practice 2

5 questions0m 0s

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Define the boundary of the model before counting. Initial water plus inflow minus outflow gives what remains when no other transfers occur. Evaporation is an outflow from the liquid store, not destruction of water.

Worked example

A model tray begins with 50 mL, receives 20 mL, and loses 10 mL to evaporation. The liquid store ends with 60 mL.

Question 1 Fictional liquid-water store: start 75 mL, inflow 20 mL, evaporation 15 mL, no other transfers. How many mL remain as liquid? Answer

Question 2 Fictional liquid-water store: start 80 mL, inflow 20 mL, evaporation 16 mL, no other transfers. How many mL remain as liquid? Answer

Question 3 Fictional liquid-water store: start 85 mL, inflow 20 mL, evaporation 17 mL, no other transfers. How many mL remain as liquid? Answer

Question 4 Fictional liquid-water store: start 90 mL, inflow 20 mL, evaporation 18 mL, no other transfers. How many mL remain as liquid? Answer

Question 5 Fictional liquid-water store: start 95 mL, inflow 20 mL, evaporation 19 mL, no other transfers. How many mL remain as liquid? Answer