Energy

About: <p><strong>Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work&mdash;i.e.,&nbsp;energy&nbsp;in the process of transfer from one body to another.</strong></p> <h2>Energy General</h2> <p>Energy makes everything happen, from boat&nbsp;engines&nbsp;moving forward to electric lights shining and lightning strikes.</p> <p>The universe is made of&nbsp;matter&nbsp;(all &lsquo;stuff&rsquo; in&nbsp;solid,&nbsp;liquid, or&nbsp;gas&nbsp;forms) and&nbsp;energy. Energy is the ability to create change. Careful scientific studies over centuries have found natural laws that govern energy&mdash;and these laws seem to be true everywhere in the known universe.</p> <h2>Energy Is A Physical Quantity That Follows Precise Natural Laws.</h2> <p>These include the&nbsp;law of conservation of energy, the&nbsp;first law of thermodynamics, and the&nbsp;second law of thermodynamics. Energy exists in how objects interact with each other. Often energy that can only be indirectly observed - by observing the processes that happen within a system. On Earth, everything from the&nbsp;weather&nbsp;to volcanoes comes from the energy flowing through the various systems around us.</p> <h2>Physical Processes On Earth Are The Result Of Energy Flow Through The Earth System.</h2> <p>Everything that physically happens, from&nbsp;light&nbsp;reflecting off a rock to currents deep in the&nbsp;ocean, happens because energy is flowing. Biological systems require energy too.</p> <h2>Biological Processes Depend On On Energy Flow Through The Earth System.</h2> <p>Every process in every living organism, including people, is driven by energy like photosynthesis and eating food. Everything from reproducing tiny cells to running down the street involves the transfer of energy.</p> <p>Energy is often useful when it is&nbsp;transformed&nbsp;or transferred. This is often referred to as 'using energy,' which is confusing because energy can't be&nbsp;used up&mdash;it just gets converted to a different form of energy! The two most straightforward ways of transferring energy are&nbsp;work&nbsp;and&nbsp;heat, both of which have specific definitions in the context of energy science. These definitions are slightly different from how the words are used in everyday language.</p> <p>Part of what&rsquo;s confusing about energy is that it is expressed using a lot of different&nbsp;units. These include units useful at the&nbsp;molecular&nbsp;level like&nbsp;electron volts&nbsp;(eV) to words used in the kitchen like&nbsp;calories. Physics classes tend to use units like&nbsp;joules, although chemists often favor calories. To make the units even more confusing, the energy sector uses units like&nbsp;kilowatt-hours&nbsp;and&nbsp;BOE (Barrel of oil equivalent, a unit of energy).</p> <p>There are also many large energy units useful for talking about energy use for whole countries like&nbsp;terawatt-hours&nbsp;and&nbsp;quads.</p> <p>The&nbsp;rate&nbsp;(energy per unit of time) that energy is transferred (or 'used') is known as&nbsp;power. When energy is transferred quickly, that means a large amount of power; when it's transferred slowly, it's less power.</p> <h2>Energy Serves Many Uses</h2> <p>Energy provides many useful&nbsp;energy services&nbsp;that allow for a high&nbsp;quality of life&nbsp;that people living in&nbsp;modernized societies&nbsp;have grown accustomed to.&nbsp;These services require a constant supply of&nbsp;primary fuels&nbsp;and&nbsp;primary flows&nbsp;to harness the needed energy. Specific services include powering vehicles (internal combustion engines), feeding populations, and generating&nbsp;electricity for&nbsp;billions of people.</p> <p>Energy also can cause damage or harm. For instance, burns are caused by an excess of&nbsp;thermal energy. Car accidents do a great deal of damage when the&nbsp;kinetic energy&nbsp;associated with driving down the street dissipates in a collision. Additionally, harnessing energy often leads to&nbsp;pollution&nbsp;and other&nbsp;environmental consequences&nbsp;like&nbsp;climate change.</p> <h2>Types Of Energy</h2> <p>Energy cannot be created or destroyed: this is known as the&nbsp;law of conservation of energy&mdash;meaning that energy must be harvested from some source. No process can create energy, no matter how nice that would be. However, many processes can&nbsp;transform energy&nbsp;from one type (like those found in nature) into another (like those useful for&nbsp;energy services). There are many different forms or types of energy that can be sorted into three main categories:</p> <p>For more information on how energy can't be created or destroyed but can only be taken from available resources in nature, please visit the page: the law of conservation of energy</p> <h2>Energy Conservation: Where Do We Get The Energy We Use?</h2> <p>Since energy cannot be created (or destroyed), people extract energy from&nbsp;high-density sources of energy&nbsp;called&nbsp;primary fuels or physical processes that move energy called&nbsp;primary flows. The energy extracted from nature is called&nbsp;primary energy&nbsp;(the sum of our fuels and flows). Most primary energy comes from fuels like&nbsp;hydrocarbons&nbsp;and&nbsp;nuclear fuels. The rest of our primary energy is from flows like&nbsp;wind power&nbsp;and&nbsp;hydropower&nbsp;(see&nbsp;fuel vs. flow). Energy can be found in nature in the form of fuels and flows, which can be harnessed and transformed into ways that are readily usable by humans. For example, the process of&nbsp;evaporation&nbsp;and&nbsp;rainfall&nbsp;allows rivers to keep flowing. We use the energy from the flow of&nbsp;water&nbsp;to create electricity, which had ultimately come from the&nbsp;sun. The energy changed form several times, but no energy was created or destroyed, just transferred.</p> <h2>General Energy: Work&nbsp;</h2> <p>Science uses very specific definitions for words, which are often different from everyday use. To a physicist, the word&nbsp;work&nbsp;means to push (exert a&nbsp;force) an object some distance&mdash;a process that (by definition) requires an input of energy like wind propelling the blades of a wind turbine.</p> <h2>General Energy: Heat</h2> <p>Heat can be both a desired and undesired result of energy utilization. For example,&nbsp;thermal energy&nbsp;heats houses and meals, which is desirable - especially in colder climates. However, heat is also a by-product of&nbsp;friction, which isn't always sought after. For instance, intricate parts in vehicles use&nbsp;lubricating oil&nbsp;to reduce friction. Still, if the&nbsp;oil&nbsp;runs out, those intricate parts will be exposed to high levels of friction, which typically leads to increased heating and severe damage within the engine.</p> <h2>General Energy: Light</h2> <p>Ultimately, most of the earth's energy comes from nuclear fusion&nbsp;that takes place within the&nbsp;sun. This energy takes the form of light, which is otherwise known as&nbsp;electromagnetic radiation. In light, energy is transferred in little &lsquo;packets&rsquo; called&nbsp;photons&nbsp;that contain discrete amounts of energy that can propagate (as&nbsp;waves) over very long distances. When the photons hit an object, they transfer their energy to the item. It's important to note that all light, not just&nbsp;visible light, is like this. Light can have many different forms that are invisible to the unaided human eye. These various forms are classified by their&nbsp;wavelength&nbsp;and occupy a broad spectrum (known as the&nbsp;electromagnetic spectrum); differing ranges within this spectrum have different levels of energy. The highest energy to lowest are gamma rays,&nbsp;x-rays,&nbsp;ultraviolet&nbsp;(UV), visible,&nbsp;infrared,&nbsp;microwave, and&nbsp;radio.</p> <p><strong>Before you go!</strong></p> <p><em><strong>Recommended:&nbsp;</strong><a href="https://www.whatsorb.com/energy/the-earth-as-an-inexhaustible-clean-energy-source"><strong>How Inexhaustible Is Earth&rsquo;s Geothermal Energy</strong></a></em></p> <p><em><strong>Did you find this an interesting article, or do you have a question or remark? Leave a comment below.<br />We try to respond the same day.<br /></strong></em></p> <p><em><strong>Like to write your article about energy transmission?<br />Send your writing &amp; scribble with a photo to&nbsp;<a href="mailto:[email protected]">[email protected]</a>, and we will write an interesting article based on your input.</strong></em></p> <p>&nbsp;</p>
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Energy General

Energy is what the world keeps turning. Solar-, wind, hydrogen-, tidal, and even energy generated in space. What are the latest innovations in the field of generating clean, green, or blue energy? Will renewables help us out from fossil energy dominance?

Energy

Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.

Energy General

Energy makes everything happen, from boat engines moving forward to electric lights shining and lightning strikes.

The universe is made of matter (all ‘stuff’ in solid, liquid, or gas forms) and energy. Energy is the ability to create change. Careful scientific studies over centuries have found natural laws that govern energy—and these laws seem to be true everywhere in the known universe.

Energy Is A Physical Quantity That Follows Precise Natural Laws.

These include the law of conservation of energy, the first law of thermodynamics, and the second law of thermodynamics. Energy exists in how objects interact with each other. Often energy that can only be indirectly observed - by observing the processes that happen within a system. On Earth, everything from the weather to volcanoes comes from the energy flowing through the various systems around us.

Physical Processes On Earth Are The Result Of Energy Flow Through The Earth System.

Everything that physically happens, from light reflecting off a rock to currents deep in the ocean, happens because energy is flowing. Biological systems require energy too.

Biological Processes Depend On On Energy Flow Through The Earth System.

Every process in every living organism, including people, is driven by energy like photosynthesis and eating food. Everything from reproducing tiny cells to running down the street involves the transfer of energy.

Energy is often useful when it is transformed or transferred. This is often referred to as 'using energy,' which is confusing because energy can't be used up—it just gets converted to a different form of energy! The two most straightforward ways of transferring energy are work and heat, both of which have specific definitions in the context of energy science. These definitions are slightly different from how the words are used in everyday language.

Part of what’s confusing about energy is that it is expressed using a lot of different units. These include units useful at the molecular level like electron volts (eV) to words used in the kitchen like calories. Physics classes tend to use units like joules, although chemists often favor calories. To make the units even more confusing, the energy sector uses units like kilowatt-hours and BOE (Barrel of oil equivalent, a unit of energy).

There are also many large energy units useful for talking about energy use for whole countries like terawatt-hours and quads.

The rate (energy per unit of time) that energy is transferred (or 'used') is known as power. When energy is transferred quickly, that means a large amount of power; when it's transferred slowly, it's less power.

Energy Serves Many Uses

Energy provides many useful energy services that allow for a high quality of life that people living in modernized societies have grown accustomed to. These services require a constant supply of primary fuels and primary flows to harness the needed energy. Specific services include powering vehicles (internal combustion engines), feeding populations, and generating electricity for billions of people.

Energy also can cause damage or harm. For instance, burns are caused by an excess of thermal energy. Car accidents do a great deal of damage when the kinetic energy associated with driving down the street dissipates in a collision. Additionally, harnessing energy often leads to pollution and other environmental consequences like climate change.

Types Of Energy

Energy cannot be created or destroyed: this is known as the law of conservation of energy—meaning that energy must be harvested from some source. No process can create energy, no matter how nice that would be. However, many processes can transform energy from one type (like those found in nature) into another (like those useful for energy services). There are many different forms or types of energy that can be sorted into three main categories:

For more information on how energy can't be created or destroyed but can only be taken from available resources in nature, please visit the page: the law of conservation of energy

Energy Conservation: Where Do We Get The Energy We Use?

Since energy cannot be created (or destroyed), people extract energy from high-density sources of energy called primary fuels or physical processes that move energy called primary flows. The energy extracted from nature is called primary energy (the sum of our fuels and flows). Most primary energy comes from fuels like hydrocarbons and nuclear fuels. The rest of our primary energy is from flows like wind power and hydropower (see fuel vs. flow). Energy can be found in nature in the form of fuels and flows, which can be harnessed and transformed into ways that are readily usable by humans. For example, the process of evaporation and rainfall allows rivers to keep flowing. We use the energy from the flow of water to create electricity, which had ultimately come from the sun. The energy changed form several times, but no energy was created or destroyed, just transferred.

General Energy: Work 

Science uses very specific definitions for words, which are often different from everyday use. To a physicist, the word work means to push (exert a force) an object some distance—a process that (by definition) requires an input of energy like wind propelling the blades of a wind turbine.

General Energy: Heat

Heat can be both a desired and undesired result of energy utilization. For example, thermal energy heats houses and meals, which is desirable - especially in colder climates. However, heat is also a by-product of friction, which isn't always sought after. For instance, intricate parts in vehicles use lubricating oil to reduce friction. Still, if the oil runs out, those intricate parts will be exposed to high levels of friction, which typically leads to increased heating and severe damage within the engine.

General Energy: Light

Ultimately, most of the earth's energy comes from nuclear fusion that takes place within the sun. This energy takes the form of light, which is otherwise known as electromagnetic radiation. In light, energy is transferred in little ‘packets’ called photons that contain discrete amounts of energy that can propagate (as waves) over very long distances. When the photons hit an object, they transfer their energy to the item. It's important to note that all light, not just visible light, is like this. Light can have many different forms that are invisible to the unaided human eye. These various forms are classified by their wavelength and occupy a broad spectrum (known as the electromagnetic spectrum); differing ranges within this spectrum have different levels of energy. The highest energy to lowest are gamma rays, x-rays, ultraviolet (UV), visible, infrared, microwave, and radio.

Before you go!

Recommended: How Inexhaustible Is Earth’s Geothermal Energy

Did you find this an interesting article, or do you have a question or remark? Leave a comment below.
We try to respond the same day.

Like to write your article about energy transmission?
Send your writing & scribble with a photo to [email protected], and we will write an interesting article based on your input.

 

Stay Updated on Environmental Improvements And Global Innovations