gravity
Gravity is really an unknown force. We can define it as a field of influence, and that it effects the entire existence of the universe. Some people think that gravity consists of particles called gravitons, which travel at the speed of light. The only thing we do know is how gravity operates in different parts of our universe. Without gravity, there would be no space and time.There is a legend that says that Galileo once dropped two objects off the Leaning Tower of Pisa to show that the heavier of the two objects dropped faster. If a feather and hammer were the two objects he used then obviously the hammer would hit the ground first. This is due to air resistance, which is the force air exerts on a moving object. This force acts in the opposite direction to that of the object's motion. In the case of a falling object, air resistance pushes up as gravity pulls down, which causes the object to slow down. When Galileo's experiment was repeated on the moon, the hammer and the feather hit the ground at the exact same time. This is due to the fact that the moon has no atmosphere. Therefore, air resistance doesn't exist on the moon. Also, the amount of air resistance on an object depends on the speed, size, shape, and density
of the object. The larger the surface area of the object, the greater the amount of air resistance on it. This is why feathers, leaves, and sheets of paper fall more slowly than pennies, acorns, and crumpled balls of paper. For example, a person on the moon weighs only about 1/6 as much as on earth. The moon's radius is 25% earth's radius and the moon's mass is 8% of earth's mass. So, if a student weighs 150 pounds on earth, they would weigh only (1/6) * 150 pounds, which equals 25 pounds, on the moon. Einstein predicted gravitational waves in 1916. They have not yet been directly detected on earth, although astronomers Joe Taylor and Russell Hulse received the 1993 Nobel Prize for proof of their existence, by showing that a
Some common words found in the essay are:
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Approximate Word count = 1262
Approximate Pages = 5 (250 words per page double spaced)
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