Question

A swimming pool is an example of an open system. Ther pool loses 10.500 J of its thermal energy to the surrounding air at night, and the surrounding air adds 2,500 J of thermal energy to the morning. According to the law of conservation of energy, what is the change in energy

Answer 1

2 and a half cows

Step-by-step explanation:

There are 14 cows and the farmer consumes 10.

His child then slaughters and consumes one and a half cows.

The farmers wife then takes one to the market.

At todays prices, a singular cow is around £1,577, so to answer your question, the family made £1,577 from the one cow the wife sold.