Questions: Question 42 (2 points) The electrons flowing from the anode to the cathode of a fuel cell move through a/an circuit to do work. - internal - circular - external - middle Question 43 (2 points) How might solar ovens help mitigate global warming? - Solar ovens are not good for use. - Solar ovens burn a fuel for heat and emit carbon dioxide when used. - Solar ovens do not help mitigate global warming. - Solar ovens do not burn a fuel for heat, but use reflective surfaces to focus the sun's rays. Therefore, they emit no carbon dioxide when used. Question 44 (2 points) is the leading producer of rare earth metals. - China - India - France - Brazil

Question 42 (2 points) The electrons flowing from the anode to the cathode of a fuel cell move through a/an circuit to do work. - internal - circular - external - middle Question 43 (2 points) How might solar ovens help mitigate global warming? - Solar ovens are not good for use. - Solar ovens burn a fuel for heat and emit carbon dioxide when used. - Solar ovens do not help mitigate global warming. - Solar ovens do not burn a fuel for heat, but use reflective surfaces to focus the sun's rays. Therefore, they emit no carbon dioxide when used. Question 44 (2 points) is the leading producer of rare earth metals. - China - India - France - Brazil
Transcript text: Question 42 (2 points) Listen The electrons flowing from the anode to the cathode of a fuel cell move through a/an $\qquad$ circuit to do work. internal circular external middle Question 43 (2 points) Listen How might solar ovens help mitigate global warming? Solar ovens are not good for use. Solar ovens burn a fuel for heat and emit carbon dioxide when used. Solar ovens do not help mitigate global warming. Solar ovens do not burn a fuel for heat, but use reflective surfaces to focus the sun's rays. Therefore, they emit no carbon dioxide when used. Question 44 (2 points) Listen $\qquad$ is the leading producer of rare earth metals. China India France Brazil
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Solution

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Solution Steps

Step 1: Analyze Question 42

The question asks about the type of circuit through which electrons flow from the anode to the cathode in a fuel cell. In a fuel cell, electrons flow through an external circuit to perform work, such as powering an electrical device.

Step 2: Analyze Question 43

The question asks how solar ovens might help mitigate global warming. Solar ovens use reflective surfaces to concentrate sunlight for cooking, which means they do not burn traditional fuels and therefore do not emit carbon dioxide. This characteristic helps reduce greenhouse gas emissions.

Step 3: Analyze Question 44

The question asks which country is the leading producer of rare earth metals. China is known to be the leading producer of rare earth metals, dominating the global market.

Final Answer

  • Question 42: The answer is \(\boxed{\text{external}}\).
  • Question 43: The answer is \(\boxed{\text{Solar ovens do not burn a fuel for heat, but use reflective surfaces to focus the sun's rays. Therefore, they emit no carbon dioxide when used.}}\).
  • Question 44: The answer is \(\boxed{\text{China}}\).
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