A CD Player and Its Battery Together Do 500 KJ

question 83

Multiple Choice

A CD player and its battery together do 500 kJ of work.The battery also releases 250 kJ of energy as heat and the CD player releases 50 kJ as heat due to friction from spinning.What is the change in internal energy of the system,with the system regarded as the CD player alone? Assume that the battery does 500 kJ of work on the CD player,which then does the same amount of work on the surroundings.

• A)-550 kJ
• B)(-50 kJ)
• C)(-950 kJ)
• D)(-800 kJ)
• E)+450 kJ

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Definitions:

Logical Reasoning

The process of using a rational, systematic series of steps based on sound mathematical procedures and given statements to arrive at a conclusion.

What-if Questions

What-if questions are hypothetical queries used for exploring different scenarios, possibilities, or outcomes, often in problem-solving, planning, or speculative thinking.

Creativity

The ability to produce original and valuable ideas or solutions by thinking beyond existing boundaries and conventions.

Right Half

Refers possibly to the right hemisphere of the brain, associated with creative and holistic thinking, or simply the right portion of any symmetrical object; the specific context is required for precise definition which here is not provided.