1) Round off to four decimal places. 2) Use black or blue ink only. Do not use pencil. 3) If not given, use standard values of the properties of water. 4) Use g = 9.81 m/s² = 32.2 ft/s². 4) Enclose each answer in a box. A tank containing water moves horizontally (parallel to length) with a constant linear acceleration of 9.85 ft/s². The tank is 10 ft long and the depth of water when the tank is at rest is 60 in. (a) What angle (degrees) does the water make during acceleration? (b) What is the minimum height of the vessel for no spilling of water? (c) What is the maximum pressure head (in)? (d) What is the minimum pressure head (in)? (e) What is the pressure difference (psi) between the ends of the tank?

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Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.