- What is the maximum efficiency of a heat engine whose operating temperatures are 570°C and 360°C?

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What is the nth derivative of sin^6(x)? Along with the steps pls*? Is every second past is like the past ze spend? A 500 mL sample of water is found to contain 0.02 g of Pb. What is the concentration of Pb in the solution? Balance: Al2(SO4)3+BaCl2 yields BaSO4+ AlCl3? Fence to be built to enclose area of 20k ft Material costs 2.50 per ft for 2 sides, 3.20 per ft for other sides Find cost of least expensive?