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.
A. Shaped an image of an effective leader.
Answer:
See the explanation below.
Explanation:
According to me, if we use Military history to learn about leadership and study the commander's mind then it will be the more constructive approach towards the subject. We can keep our focus on military affairs which have large impact on our society.
Military history as a discipline record the armed conflict in the history of humanity and tries to assess it's impact over economies, societies, culture, etc. which in result lead to changes or development in local and international affairs. It also help us to study about military strategy adopted by each side and help in assessing how these tactics and technologies have changed with time, for example, it tries to explain that how warfare led to the development of weapon and with time how emerging technologies have shaped these weapons.
We know the length and width, so the width subtracted from the length will tell us how much bigger the length is.
So the length is
feet longer than the width
