Unit of energy measurement
What is energy
is defined as the ability to do something, and energy is exploited in various ways through the use of equipment to convert it from one form to another without being destroyed or created.
Energy exists in many forms, including kinetic energy, thermal energy, electrical energy, chemical energy, and other forms.
Sources of energy are classified into natural sources or industrial sources, as there are many important sources of energy, including the sun, natural water resources, and fossil fuels such as coal, natural gas, and contribute to the study and knowledge of how to generate energy and how much is obtained It has to indicate the possibility of planning the way it is used and ensuring its preservation, as the percentages indicated a rise in energy production in the past 400 years, beginning of the Industrial Revolution.
After several studies, Einstein came up with an equation linking mass and energy, which was clarified by the physical equation 2^E=MC, which states that the energy of anybody is equal to the amount of its mass multiplied by the squared value of the speed of light, as the letter E, which is derived from the word Energy stands for energy, m stands for mass as it is derived from the word mass, while C stands for the speed of light.
The joule unit is the main unit of energy measurement used in the International System of Units, and the unit was named the joule after the English physicist James Prescott Joule, and one joule is equal to work done by a force by one newton over a distance One meter, and one joule equals 1 watt/second, that is, it is equal to the energy emitted in one second by a current of one ampere through a resistance of one ohm. Among the units used in energy:
- 1 watt is equal to one joule per second.
- 1 kilowatt-hour (kilowatt-hours) = 3.6 x 106
- J. 1 British Thermal Unit is equal to 1055 J.
Energy content of fossil fuels
The amount of energy from fossil fuel sources is as follows:
- Coal capacity is estimated at 25 million British thermal units per ton.
- Crude oil has a capacity of 5.6 million British thermal units per barrel.
- The energy of oil is 5.78 million British thermal units per barrel = 1,700 kWh/barrel.
- Gasoline has a capacity of 5.6 million British thermal units per barrel (42 gallons barrel) = 1.33 therm/gallon.
- NGL capacity is 4.2 million British thermal units per barrel.
- Natural gas has an estimated capacity of 1030 BTUs per cubic foot.
- Wood energy is 20 million Btu/rope.
Types of energy
There are many types of energy, but they can be categorized into two types:
– Potential energy
Potential energy has 4 forms:
- Chemical energy: Chemical energy binds atoms and molecules together.
- Nuclear energy: Nuclear energy is formed from the energy in the nucleus of an atom, and large amounts of energy may be emitted when the nucleus is combined or separated.
- Stored Mechanical Energy: The energy in an object due to the effect of a force on it, including compressed springs and stretched rubber bands.
- Gravitational energy: Weight is related to the body’s gravity, so that the gravity increases with the increase in weight, while the gravitational energy is converted in areas of steep descent in the presence of the velocity factor into kinetic energy.
– Kinetic energy
Kinetic energy has 5 forms:
- Electrical energy: is the movement of charges from one place to another due to the influence of a force, and electrical energy is delivered by electrons moving in a specific direction.
- Thermal energy: It is the internal thermal energy of the body, as it results from the vibration of the atoms and molecules that make up the material.
- Radiant energy: Radiant energy is electromagnetic energy that travels through transverse waves, such as visible light, X-rays, gamma rays, and radio waves.
- Sound energy: The percentage of energy expended in sound is low compared to other types of energy, as sound results from the movement of energy through materials in compression waves, and it is due to the vibration of an object.
- Motion energy: is the energy that is formed due to the movement of objects. It increases with increasing speed and gradually decreases when decelerating.