Question

who improve steam engine produce by Newcomen​

Answer 1

James Watt

In about 1712 another Englishman, Thomas Newcomen, developed a more efficient steam engine with a piston separating the condensing steam from the water. In 1765 James Watt greatly improved the Newcomen engine by adding a separate condenser to avoid heating and cooling the cylinder with each stroke.

Answer 2

Answer:

James Watt improved the stream engine produced by a newcomen