Answer:
C
Explanation:
Roman engineers improved upon older ideas and inventions to introduce a great number of innovations. They developed materials and techniques that revolutionized bridge and aqueducts' construction, perfected ancient weapons and developed new ones, while inventing machines that harnessed the power of water.
Answer:
D, only people born in Europe could hold highest options
<span>The concept of capitalism was devised by a man named "A. Adam Smith" who wrote a book called The Wealth of Nations in 1776, since it was Smith who spoke of the "invisible hand of the market". </span>
Answer:
The modern uses of radar are highly diverse. including air and terrestrial traffic control, radar astronomy, air-defense systems, antimissile systems, marine radars to locate landmarks and other ships, aircraft anti collision systems, ocean surveillance systems, outer space surveillance and rendezvous systems. radio waves, being just a specific slice of the light (EM) spectrum, can travel through space just fine. Actually, light travels slightly faster in space than in air. It travels at the cosmic speed limit. They can be used to detect obstacles in a distance of around 30 meters and measure their speed. They are placed in bumpers or on the sides of a vehicle and warn about possible collisions with objects or persons. In addition, they can be used to support the parking process.
Explanation:
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