Answer:
I'm assuming you're talking about thermodynamics in history?
If not, tell me in comments and I'll answer there
Explanation:
Historically, thermodynamics developed out of a desire to increase the efficiency of early steam engines, particularly through the work of French physicist Nicolas Léonard Sadi Carnot (1824) who believed that engine efficiency was the key that could help France win the Napoleonic Wars.
They sent letters back and fourth by ship
Answer: because it was the day black people were free from slavery
Explanation:
Only one choice is true. Life in China today has no free elections.
