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Yesterday, 16:44

Joan completed a science experiment using a sling psychrometer. She made the following notes in her science journal. Joan made one mistake while recording her notes. Which sentence reveals her mistake?

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  1. Yesterday, 18:49
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    It felt hot in the science lab, and my skin felt sticky. I ran the experiment by spinning the sling psychrometer. There was a very small difference in the dry bulb and wet bulb temperatures. This is the result of the water on the wick of the wet bulb evaporating rapidly. The evaporation caused a slight drop in the level of mercury in the wet bulb. I conclude that the relative humidity in the lab is very high.

    I think the answer should be The evaporation caused a slight drop in the level of mercury in the wet bulb.
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