Consider your body as an open system. For five days in row record your energy intake as well as your body mass. The measurements of body mass should be done twice a day, in the mornings and evenings at the same time for all five days.

Use the First Law of Thermodynamics to analyze your body mass. Please note that the energy surplus is converted to a fat $($mass$).$ Plot your weight versus time $($days$)$ and try to explain the graph.

Answer the following questions:

$1.$ Does your body mass clearly correlate to your recorded energy intakes? Explain and prove.

$2.$ How accurately can you predict your body mass loss from the energy intake analysis? What are the difficulties in predicting body mass?

$3.$ Identify three most energy consuming activities and three the most energy rich intakes for five days recording period.

$4.$ Based on the thermodynamics analysis, what do you think is the best diet for you in case you want to lose some weight? Explain.

$5.$ Why is it so difficult to reduce body mass? Answer it from the thermodynamics point of view?

I did what our professor said and noted everything:

Day $1$:

Morning: $68\mathrm{.}1$ kg

Night: $67\mathrm{.}0$ kg

Activities: Approximately $1$ km walk, $5$ hours sleep.

Energy intake: No breakfast, pizza medium, $4$ slice, k$$s$$r $($Turkish meal$),2$ litr water, $2$ bread $(800$ g in total$)$

Day $2$:

Morning: $67$ kg

Night: $67\mathrm{.}5$ kg

Activities: Approximately $1$ km walk $+$ Dance for $10$ minutes $+5$ hours sleep

Energy intake: Mushroom, chicken chest $3$ piece, $2$ bread $(800$ g in total$),2$ litr water, $4$ hours sleep

Day $3$:

Morning: $66\mathrm{.}8$ kg

Night: $66\mathrm{.}5$ kg

Activities: $8$ hours sleep, $1$ km walk

Energy intake: $1$ hell energy drink, spaghetti, $1$ bread $(400$ g$)$

Day $4$:

Morning: $67\mathrm{.}00$ kg

Night: $67\mathrm{.}70$ kg

Activities: Approximately $2$km walk, $8$ hours sleep

Energy intake: Dolma $($Azerbaijani meal$),2$ eggs, $100$g soussage, $2$ hell ebnergy drink, $2$ bread $(800$ g in total$),1\mathrm{.}5$ L water

Day $5$:

Morning: $66\mathrm{.}50$ kg

Night: $69\mathrm{.}6$ kg

Activities: Walking $500$ m

Energy intake: $3$ bread $(1200$ g in total$),2$ eggs, $2$ hell energy drinks, mashrooms