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9. An object with a mass of 78kg is on a magnesium material floating on the water. The density of the magnesium is 782

9. An object with a mass of 78kg is on a magnesium material floating on the water. The density of the magnesium is 782 kg/m3 and is barely out of the surface of the water. Determine the volume of the magnesium. 10. Determine the heat required to melt 2.2kg of gold at 25C to 195C.

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