Question

A system being studied is classified as an open system. Transferred out of 1

the system is 45 J of energy. The energy is converted to heat, mechanical,
and electrical energy. If mechanical energy measured 20 J and electrical
energy measured 5 J, how many joules were converted to heat energy?*
5 Joules
10 Joules
20 Joules
25 Joules
30 Joules

Answer 1

answer: 20 Joules because 45-20-5=20

Answer 2

25 joules because it’s more correct