Question

mechanical theory was of head was introduced by

Answer 1

Answer:

In an internal combustion engine, the cylinder head sits above the cylinders on top of the ... In a flathead or sidevalve engine, the mechanical parts of the valve train are all contained ... Modern, efficient engines thus tend towards the pent roof or hemi designs, where the valves are brought close into the center of the space.

Explanation:

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Answer 2

Answer:

In the history of science, the theory of heat or mechanical theory of heat was a theory, introduced in 1798 by Sir Benjamin Thompson (better known as 'Count Rumford') and developed more thoroughly in 1824 by the French physicist Sadi Carnot, that heat and mechanical work are equivalent.