Answer:The coal-fired steam engine was in many ways the key technology of the Industrial Revolution. Steam power was first used to pump water out of coal mines by Thomas Newcomen, who invented the first steam engine that truly worked in 1712. ... Watt had taken Newcomen's design and improved upon it.
Explanation:
I am pretty sure that BTS spoke at the United Nations
Answer:
President Calvin Coolidge
Explanation:
The State of Union address was first broadcast on the radio in 1923 when President Calvin Coolidge made his annual speech.
