Answer: Air brakes
Explanation: The introduction of air brakes by George Westinghouse marked one of the most important safety upgrades in railroad travel. The air brakes which is powered by compressed air connected to the braking cylinders which automatically serves air to the brake pipes once the brake pressure falls. This automatic airbrakes offered an escape from the inefficient and manual brake system usually employed before it's invention whereby brakemen are charged with the task of controlling the braking system using the brake wheel in other to alt the train's movement. This manual method is both tedious and unsafe.
Jabs streaks Justin jejune endnote flight for mhdb McLeod Ben nudge night bends nene down bend Kentucky Nandi MSN’s snickers MSN’s
Answer:
the idea that the tax system should be fair. biggest debate is who should pay. 2 basic approaches (ability to pay principle and benefits received principle)
Explanation:
The most common economic activity in Mongolia is herding livestock, such as raising cows, poultries, or sheep.
The two problems that facing the country is water shortage, which make it hard for them to maintain their main economic activities and their inability to compete with foreign trades.
