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Bogdan [553]
3 years ago
14

Which best explains why a wood- burning fireplace represents an open system?

Physics
2 answers:
Anna11 [10]3 years ago
6 0

D. Fire requires oxygen

11111nata11111 [884]3 years ago
4 0
D-Because a fire requires oxygen from the atmosphere to burn
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Answer:

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Explanation:

From the question we are told that:

Length l=3.0m

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Generally, the equation for Torque Balance is mathematically given by

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The correct answer is

C. reduce the friction between its moving parts


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When an object is falling and reaches a constant velocity, the net force on the object is <em>zero</em> (it's not accelerating), and the weight of the object is equal to <em>the force of air resistance against the object</em>.  (choice-D)

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