Q4: A simple manometer containing mercury is connected to pipe in which an oil of specific gravity 0.85 is flowing. The pressure in the pipe is vacuum. The other end of manometer is open to atmosphere. Find the vacuum pressure in bar of the pipe if the difference of mercury level in two limbs is 20 cm and height of oil in the left limb from centre of pipe is 12.5 cm below. What happens to vacuum pressure if difference of mercury level in two limbs becomes 10 cm. Comment on the results with respect to vacuum pressure.

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Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.