- Discover essay samples

What Is Physics?

4.9 of 5.0 (196 reviews)

1009 words
Science & Nature

What Is Physics? page 1
What Is Physics? page 2
What Is Physics? page 3
The above thumbnails are of reduced quality. To view the work in full quality, click download.

As I researched, I found many different definitions of Physics, some being very complex and others being simple and to the point. In defining physics, firstly, I would have to mention that the early history of physics is interrelated with that of other sciences, maths and concepts. As we know, the first areas of physics to receive close attention were mechanics and the study of planetary motions. The great breakthrough in astronomy, another form of science, was made by Nicolaus Copernicus, who proposed the heliocentric model of the solar system that was later modified by Johannes Kepler, using observations by Tycho Brahe, into the description of planetary motions, an area of physics, that is still accepted today. Newton's Three Laws of Motion are also famous in physics today. He arrived at his results of these laws, by inventing a form of entirely new branch of mathematics, calculus, which has become an essential tool in most branches of physics. Therefore, I have come to state that physics is considered as 'a body of knowledge and as the practice that makes and transmits it. The growth of physics has brought not only fundamental changes in ideas about the material world, but also, through technology based on laboratory discoveries, a transformation of society.'
Uncertainty in Measurements
Because the number of digits that are valid for any measurement is limited, the precision of all measuring devices is also limited. Every measurement is subject to uncertainty.
Causes of uncertainty:
1. temperature
2. magnetic fields
3. parallax
4. carelessness

Chapter 3:

General Principles of Temporal Displacement

In chapter 3, we learned that displacement is the change in position of an object. Because this interests me I decided to enlighten you on the subject of Temporal Displacement. The TARDIS is a powerful machine that allows temporal displacement from within the space-time dimension. It is most important that the operator of the TARDIS have a fundamental understanding of temporal displacement ('time travel') if he or she is to understand and successfully pilot the TARDIS. There are only four laws of time travel, but first you must understand the Circular (linear) Theory of Time, which is the general theory of time that most events are regulated by. In this theory one is required to picture the space-time continuum as a 'laser disk', a circular plane with a starting point at the center. 'The creation of the universe is dubbed Event One, and it is this that the center of the disc represents. At the boundary it is theorized that time runs backwards and all event waves now head towards Event One.' The term given to this process when the TARDIS dematerializes from one point in space-time and rematerializes in another. In effect, the TARDIS is skipping tracks, traveling to tracks long passed or journeying ahead of the event wave. Track skipping is really another name for temporal displacement or 'time travel'.

Chapter 4:

'You sit in an elevator like cart which goes all the way to the top of the ride. It goes forward a little'and then swoosh you're dropped down.'


As you dropped down the tracks all the potential energy that was stored up when you ascended up in the elevator turns into kinetic energy, which is energy in motion. This is an example of the Law of Conservation of Energy. However, because this is a 'real world' example all the potential energy does not convert into kinetic energy due to some lost to friction.
While falling you yourself will be in free fall where there is a weightlessness feeling. Free fall is motion determined solely by gravitational forces. This is due to the fact that the only force acting on you is gravity. This acceleration is known as the acceleration due to gravity, represented by the letter g, which is equal to 9.8 m/s2 or 32 ft/s2. The acceleration due to gravity differs on each planet because of the different gravitational strength. On Mars the g is 3.3 m/s2. On Jupiter the g is 25.6 m/s2. On the moon the g is 1.67 m/s2.
As we know, the speed at which an object is falling during free fall can be determined, when started at rest, by this equation: v= g * t
The distance an object has traveled during free fall can be determined, when started at rest, by this equation: s = 1/2g(t)2
A free falling object, such as a sky diver, can reach a speed of more than 118 miles per hour however there is a certain speed, the terminal velocity, where you can't going any faster due to air resistance. A parachutist experiences free fall for a brief period before the parachute opens, but the force of air resistance against the person's body soon becomes significant and he or she no longer falls freely.

Chapter 7:

Pendulum Rides

Pendulum rides are a little like the swing sets you might remember from your childhood. Swings give you a feeling of flying in a controlled manner. You pump your legs to provide enough force to increase the height of the swing's arc, and enjoy the increased velocity of the downward swing. When you stop pumping, the swing gradually slows and then stops.
Some people wonder what causes the feeling of 'weightlessness' on pendulum rides.
Riders often experience near-weightlessness as they approach the top of a pendulum ride. 'If the ride is the type that makes a complete 360-degree circle, they experience a feeling of complete weightlessness.'
'Feelings of weightlessness are not due to a decrease in forces of gravitation; people do not feel forces of gravity. What you feel is the force of a seat pushing on your body with a force to counteract gravity's downward pull. A 180-pound person at rest in his office chair experiences the seat pushing upwards on his body with a force of 180 pounds.' Yet at the top of a ...

You are currently seeing 50% of this paper.

You're seeing 1009 words of 2018.

Keywords: what is physics definition, what is physics class 11, what is physics wallah, what is physics in hindi, what is physics about, what is physics class 9, what is physics in high school, what is physics short answer

Similar essays

Creatine In Sports

Athletes today will do almost anything to get an edge. One of the primary things an athlete will do is put supplements into their body. These supplements range from protein shakes to illegal anabolic steroids. Some sports supplements are incredibly safe and effective, yet others work for a while and then fizzle out, while others still work well...

197 reviews
Atmospheric Circulation And More

The global energy balance and atmospheric motion mainly determine the circulation of the earth's atmosphere. There is a hierarchy of motion in atmospheric circulation. Each control can be broken down into smaller controlling factors. The global energy balance is an equal balance of short-wave radiation coming into the atmosphere and long-wav...

20 reviews
Biochemistry Terms

Name: Suzaine Bernadette M. Estor Section: MLS-2B Define the following terms: Electronegativity - is a measure of the tendency of an atom to attract a bonding pair of electrons (Clark,2020). Tends to be more specific on how much atom to attract on a bonding pair of electrons or keep the electrons to get closer to the element in a covalent bond....

9 reviews
Alternative Medicine

The health care industry has a variety of policies and standards regarding coverages for modalities. From a sociological standpoint, unconventional, alternative, or unorthodox therapies refer to medical practices that are not in conformity with the standards of the medical community. The New England Journal of Medicine defines unconventional ther...

62 reviews
The Sun

Of all the stars in our galaxy we find our Sun the most important. For supports life on earth and keeps the planets in a certain "line".Without the sun we could not survive. History of the Sun People have studied the stars since day one. Many cultures have studied and worshiped the sun. This was the earliest form of studying the moon. In 1611...

138 reviews
Alcoholism An Intrepretation

Alcoholism has been a problem throughout the history of humanity, a disease which has caused many people to be overcome with burdens, problems, and debts. Alcoholism is a term that is widely recognized throughout the United States and the World. Alcoholism is a chronic disease, progressive and often fatal; it is a disorder and not due to other dise...

78 reviews
Cardiac Pacemakers

The heart is bestowed with a specialized system that automatically generates rhythmic control via the sinus node, located in the superior lateral wall of the right atrium near the opening of the superior vena cava. The specialized pacemaker cells dictate control of the rest of the heart through regular electrical impulses that propagate from the r...

139 reviews
Endangered Manatee

New York Times April 11, 1996 The manatee population has suffered a devastating blow so far this year. About 221 manatees have been found dead already. Out of those 221, 128 have no obvious cause of death. Marine biologists have been unable to find the cause of these deaths. They suspect that the Red Tide off of the coast of southwest Florida...

12 reviews
Alternative Medicine

Throughout the last few years has drawn a ton of attention towards itself. New ideas and new styles of this medicine are introduced into the media everyday. Despite all the attention to this new trend what do we actually know about it? Is it safe? What studies have been done? In a time when people are looking for a change and living life to the...

194 reviews
Devastation Of The Rain Forests

"We know there will be problems in environmental terms, many serious problems, but it is a matter of economics. There won't be any complete disaster, and what we cannot solve, well, that's the price we have to pay." - Eduardo Albuquerque Barbosa There is a constant war that is being fought in the rainforests of South America. The death t...

23 reviews

Period 3 Grade 8 is a mineral. it is not a plant or a animal. is a metallic metal. It can never be broken down into differnet substances by normal chemical means. was one of the first metals known to humans. People liked it because in it's native condition, it could easily be beaten into weapons or tools. has been one of the most useful metals...

1 reviews
Canadian Black Bear

The There are 8 kinds of bears (Ursus) in the world but I chose the North American Black bear (Ursus americanus). I will be covering general information about the bear such as their size, weight, color, food, etc., but I will concentrate mainly on the hibernating cycle of the black bear. There are from 400,000 to 750,00 black bears in North Americ...

163 reviews
Natural Forces

A natural force is a power brought on by nature. , unlike those of other powers, are uncontrollable. When a hurricane passes along the coast, a bolt of lightning strikes a rooftop, and a volcano erupts, these are all examples of . can have devastating effects on wildlife, humans, and the earth itself. Our effects to resist these occurrences, our...

126 reviews
Egyptian Bedouins

The Life of the The Bedouin people of Egypt can easily be described as a people with no place to call a home. Studying the Bedouins show that they have a deep and unique culture. They do not get involved in politics, and they live a humble and modest life. The Bedouin Nomads of Egypt are predominantly Muslim. Therefore, their beliefs, practice...

212 reviews
Atsisiųsti šį darbą