system
10 units (out)
5 units (out)
5 units
10 units
15 units
20 units

Question

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Definition of System" ], "new_concepts": [ "Conservation of Energy", "Open System Balance" ], "current_concepts": [ "Definition of System", "Conservation of Energy", "Open System Balance" ] } ## Identify system inputs and outputs Using the *Definition of System* knowledge point $$ \begin{aligned} &\text{Input (top arrow)} = Q_{\text{in}}\ &\text{Output 1 (right arrow)} = 10\text{ units}\ &\text{Output 2 (bottom arrow)} = 5\text{ units} \end{aligned} $$ ## Apply conservation principle Using the *Definition of System* knowledge point $$ \begin{aligned} &Q_{\text{in}} = Q_{\text{out, total}}\ &Q_{\text{in}} = 10 + 5 = 15\text{ units} \end{aligned} $$

5 units

10 units

15 units

20 units

{ "subject": "Natural Science", "question_type": "Multiple Choice", "knowledge_point": [ "Natural Science", "Physics", "Conservation of Energy" ] }

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QUESTION IMAGE

Question

Explanation:

Identify system inputs and outputs

Apply conservation principle

Answer: