Rochelle, as a chemist studying thermodynamics, would likely focus on topics that relate to the relationships between heat, energy, and work. Therefore, the topics she might research include:
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How a new engine converts thermal energy into work: This directly relates to thermodynamics, as it involves the conversion of thermal energy (heat) into mechanical energy (work).
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The amount of heat produced by a certain reaction: This is a fundamental aspect of thermodynamics, particularly in understanding exothermic and endothermic reactions and the heat changes associated with chemical reactions.
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The temperature required to melt a certain metal: This involves phase changes and energy transfer, which are important concepts in thermodynamics.
The other topics, while interesting, do not primarily relate to thermodynamics:
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How subatomic particles behave at extremely high speeds: This falls more into the realm of physics, particularly quantum mechanics and relativity.
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The vibrations that are produced by musical instruments: This pertains more to acoustics and the physical properties of sound.
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How light is affected by passing through a plastic lens: This topic is related to optics rather than thermodynamics.
In summary, the relevant topics for Rochelle are the conversion of thermal energy into work, the amount of heat produced in chemical reactions, and the temperature required for phase changes.