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如图19是小明探究电流产生的热量与哪些因素有关的装置:在两个相同的烧瓶中装有质量___▲____(选填“相等”或“不等”)的同种液体,瓶中各放置一根电阻丝,且R甲大于R乙,这样的装置可以研究电流产生的热量与_ _▲____的关系;实验中通过观察______▲_______来比较电阻丝发热量的多少;如果所用液体仅有水或煤油,为使实验现象明显些,应选择___  ▲______来进行实验。
相等,电阻,温度计温度的变化,煤油解析:
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