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A machine does $W = 400 \text{ J}$ of work in $t = 20 \text{ s}$. What is the power $P$ in Watts?
- A.$40 \text{ W}$
- B.$8000 \text{ W}$
- C.$20 \text{ W}$
- D.$10 \text{ W}$
Show correct answer & step-by-step solution
Correct answer: C — $20 \text{ W}$
Solution
Power is defined as . Dividing by results in .
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