Video Errata: When labeling the picture on the left (the one in 3D), the speaker said to start the axes at the top of the water. This is not correct: start it at the top of the tank as he did in the right-hand drawing, looking at the tank from the side. Also, the speaker used the wrong weight density: since we are working in ft, it needs to be 62.5 ft/lb\(^3\), NOT 9800 N/m\(^3\).
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WIR 20B M152 V21