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tankabanditka [31]

3 years ago

9

Please help on this one?

2 answers:

vova2212 [387]3 years ago

7 0

Answer: The system internal energy is 40 Joules.

Explanation: As suggested, the formula $\Delta U = Q-W=(70-30)J = 40J$ should be used. 70 Joules worth of thermal energy are added, and the system does 30 Joules worth of work (energy expenditure).

GrogVix [38]3 years ago

7 0

L’énergie interne du système est de 40 Joules.

because

la formule devrait être utilisée. Une énergie thermique de 70 Joules est ajoutée et le système effectue un travail de 30 Joules (dépense énergétique).

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