<![CDATA[Abstract: The purposed of this reserach and development study is to produce an experiment’s device of gas calorimeter as a physics learning media of senior high school students. This device consist of the tool kit and user manual. There were 5 expert in physics learning have been participated in the validity process of this research. The research found that the gas calorimeter tool kit and user manual has a good criteria as physics learning media.Keywords: Design and Validation, Research and Development, Gas Calorimeter tool kit.]]>
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