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WHAT IS PHYSICS

Most people run away when they hear the word 'physics.' But it's not just for rocket scientists. You are surrounded by physics all the time, and whether you realize it or not, you use physics every day. Therefore, what is physics?

Definition

Physics is derived from the Latin word 'physica,' meaning "natural thing." it is a broad discipline that deals with the study of matter and energy. It elaborates on how the two interact with each other. One fascinating aspect of the subject is, it keeps on changing from time to time. The more it turns, the more questions pop in with new knowledge on the study.

It tries to answer the fundamental questions through experiments and observations made on the problem. With this in mind, it enables you to analyze and articulate the natural phenomena of the universe.

The subject matter is widely recognized for the numerous scientific laws that try to explain how the universe works. They describe the fundamental aspects that have repeatedly been tested and verified. These laws help you understand the 'truths' and predict the behaviors of other things.

Different fields of physics

Physics creates a pillar for other natural sciences. Not only is it fundamental to all other sciences, but also it's a broad and complex field. Due to this, it's divided into different disciplines. These branches enable scientists to specialize and be experts in their narrow fields of physics.

Modern physics

This is a branch of physics that is mainly concerned with quantum mechanics and the theory of special relativity. It elaborates how matter and energy are related and why they're regarded to be similar entities. It is classified into two pillars;

  • Theory of relativity. It alludes that the laws of physics are the same for all non-drifting observers
  • Quantum theory. It articulates the nature and behavior of matter and energy based on the atomic and subatomic level.
  • Classical physics

    It deals with the laws of motion and gravitation, and the kinetic theory and thermodynamics. It is mostly concerned with matter and energy. The law of motion describes how a body, upon which forces may act, may exert thrust on other objects. This law falls in three theories;

  • Law of inertia, which alludes that a body will remain at rest unless an external force changes the condition.
  • The second rule explains that the force applied is equal to the change in momentum over a while. Thus, thrust equals the mass multiplied by impulses.
  • Conservation of momentum, which asserts that for every action in nature there is an equal and opposite reaction.
  • Nuclear physics

    This is a field of physics that deals with the study of the composition, structure and the behavior of the atomic nuclei. It includes the study of subatomic particles such as electrically charged neutrons, electrons, and the positively charged protons.

    Geophysics

    It is an interdisciplinary study of physics and geography that studies the composition, shape, and structure of the earth. This discipline explains how the natural phenomena of the universe like the magnetic field and gravitational force affect the land.

    Atomic physics

    This is a branch of physics that studies the composition of the atom alone excluding the nucleus. It examines the behavior and arrangement of electrons around the core. The primary significance of atomic physics is to explore the electrons, ions and neutral atoms.

    Optics

    This is the fundamental study of sight. It deals with the study of electromagnetic radiation, its interaction with matters, and the instruments used to gather the info. This field is essential in the departments of quantum optics and wave optics. A significant invention noted from this branch is the invention of lenses.

    Mechanical physics

    It is well known as mechanics. It is a branch of physics that studies the motion of physical objects under the influence of external forces. It has two pillars of physics; quantum mechanics which is concerned with the behaviors of the smallest particles (neutrons, protons, and electrons) and classical mechanics which deals with the law of motion of physical objects and elaborates on how the external forces affect the objects.

    Biophysics

    This is an interdisciplinary study that is concerned with the study of biological events and problems with the aid of physics principles and techniques. It helps biophysicists to monitor the molecular structure of living organisms. This branch is also responsible for the discovery of the DNA structure.

    Thermodynamics

    It is a branch of physics that deals with the temperature and heat and explains how they relate to energy and work. This discipline elaborates on the principles of volume, pressure, and temperature. The laws of thermodynamics are described in four significant rules;

  • The Zeroeth law which makes a notion of temperature possible and thermal equilibrium in thermodynamic systems.
  • First law which states that energy can neither be destroyed nor created, but can only change in form.
  • Second law which relates to the natural flow of energy within an enclosed system.
  • Third law which suggests that it's impossible to develop a perfectly efficient process.
  • The significance of the study

    Physics not only deals with theoretical concepts but also applies in every sphere of human activity. It plays a crucial role in driving innovations and development of new technologies. Some of the significance of the study include the following.

    It generates fundamental knowledge needed for future technological advances that will continue to drive the economic engines. For instance, the medical sector has much equipment in almost all departments like the treatment of cancer through radiotherapy and diagnosing illness through various types of imaging. Knowledge in nuclear physics has led to the development of sustainable forms of energy production.

    The subject matter has also helped in establishing communication through the invention of telephones, and radio technology through the concept of wireless telegraphy. It also enables geophysicists to understand and predict calamities such as earthquakes. As can be seen, it indeed is a spectacular subject with a broad scope of information that is beneficial to both the society and the schools' system. In case you need physics help or more info on the subject you can contact us today for prompt assistance.

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