Galileo Galilei was an Italian astronomer, physicist and engineer.<em> </em>He invented the Galileo Celatone, Galileo proportional compass, micrometer, and Galileo's escapement.
Galileo is considered one of the greatest astronomers of all time. His discovery of Jupiter’s major moons (Io, Europa, Ganymede and Callisto) revolutionized astronomy and helped speed the acceptance of the Copernican Model of the universe. However, Galileo is also known for the numerous scientific inventions he made during his lifetime.
These included his famous telescope, but also a series of devices that would have a profound impact on surveying, the use of artillery, the development of clocks, and meteorology. Galileo created many of these in order to earn extra money to support his family. But ultimately, they would help cement his reputation as the man who challenged centuries worth of previously-held notions and revolutionized the sciences.
Hydrostatic Balance:
Inspired by the story of Archimedes’ and his “Eureka” moment, Galileo began looking into how jewelers weighed precious metals in air, and then by displacement, to determine their specific gravity. In 1586, at the age of 22, he theorized of a better method, which he described in a treatise entitled La Bilancetta (or “The Little Balance”).
Pendulum Clock:
During the 16th century, Aristotelian physics was still the predominant way of explaining the behavior of bodies near the Earth. For example, it was believed that heavy bodies sought their natural place or rest – i.e at the center of things. As a result, no means existed to explain the behavior of pendulums, where a heavy body suspended from a rope would swing back and forth and not seek rest in the middle.
Spring driven pendulum clock, designed by Huygens, built by instrument maker Salomon Coster (1657),[96] and copy of the Horologium Oscillatorium,[97] Museum Boerhaave, Leiden.
The part of Muslim Spain that resisted the Christians the longest is GRANADA.
Following the rule of Muslims in Spain for over 700 years, the Christians began to conquer the Muslim states in the Iberian peninsula particularly modern-day Spain.
In the period known as Reconquista around the 13th century, it was only Granada that remains out of all the city-states being ruled by the Muslims. Granada eventually falls during the Granada war in the late 15th century.
Answer - As Russia became engulfed in World War I, over fifteen million men joined the army, which left a shortage of workers for the factories and farms. This led to widespread shortages of food and materials. As goods became more and more scarce, prices went through the roof, and soon famine consumed Russian cities.
