Historically, man first had himself and the sun to provide energy. The first two come directly from the sun, the second two come indirectly from the sun, and the last two are independent from the sun. The unit measure of natural gas is the cubic foot (CF) which is about equivalent to 1000 Btu's.Įnergy can be in the form of thermal, radiant, electrical, mechanical, chemical, and atomic energy. The unit measure of electricity is the kilowatt hour (kWh), which is about equivalent to 3,412 Btu's. The unit of energy most often used in this country is the Btu (British Thermal Unit). LESSON / INFORMATION: Energy Energy is the capacity to do work. (3) Know the energy sources and explain why some sources are renewable and some are nonrenewable. (2) Be able to associate everyday energy use with the original sources. OBJECTIVE: The student will: (1) Recognize different energy sources. GOAL: To learn the different energy sources and to distinguish between renewable and nonrenewable resources. Neon light, which is generated as the reaction of the element, is also radiant energy.Natural Energy Sources NATURAL ENERGY SOURCES Artificial light sources like incandescent, halogen, or LED light bulbs would be in this form. Light from natural sources like the light given off by a burning candle or campfire, or sunlight-as well as the sun's reflection off of the moon, planets, and other objects-is radiant energy. There are a wide variety of sources of light, all of which can be considered radiant energy. Heat is transferred as energy in all of these cases, radiating in temperature-responsive waves. Heat can even radiate up from the hot street on a summer day. Heating coils can be embedded under a flooring system to warm up a room, or can be woven into fabric that allows professional rescuers to warm a body during a hypothermia emergency. Radiant energy in the form of heat can be anything from a complicated system that conducts geothermal heat from underground, to a simple campfire. Radiant energy is important in a lot of fields, including telecommunications (especially over long distances and through wireless networks), heating technology, radiometry, and lighting. However, radiant energy is one of the forms whose particles can move within a vacuum quite efficiently. Soil, for example, absorbs radiant energy, and this light and heat absorption warms seeds and roots in the soil to promote growth. One of the interesting facts about radiant energy is it moves in a straight line, and it can be absorbed or reflected if the object cannot absorb it. Although radiant energy is the result in the change in configuration in an arrangement of electrons, EM is really just a stream of photons, and heat is felt or light is viewed as those photons in the form of radiant energy. It's a form of kinetic energy, since the particles are moving as they carry light, heat, and radiation from one source to another source.Įlectromagnetic radiation is all around us in a variety of forms, but it's most often released as normal light. It's the energy given off by electromagnetic radiation. Radiant energy is simply energy that travels in waves, or sometimes in particles. Radiant energy has a fancy-sounding name for a really simple concept.
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