Introduction
In everyday life, we regularly come across the terms such as heat, temperature, cool, etc. But what do those terms actually mean? So in this essay, we are going to learn the real meanings of those terms and how the heat is transferred from a place to place, and understand the real context of those terms in everyday life.
Everyone has felt heat, but what is it? The simple answer is that heat is energy. In physics heat is identified as a source of energy and can be observed only when it is transferring from a one place to another. All matter in the universe, is made up of molecules and atoms. These atoms are always in different types of motion and this motion of atoms and molecules creates heat or thermal energy. All matter has this thermal energy. The more motion the atoms or molecules have the more heat or thermal energy they will have.
Heat always tends to travel from a place to place whenever there is a suitable physical pathway exists between the source object and the destination object. In addition, it will always be travelling from a hotter object to cooler object. Heat travels in waves like other forms of energy, and can change the matter it touches. It can heat matter up by the molecules the move or it can cause chemical reactions like burning to occur. The path will be either direct or indirect depending on the mode of transfer of heat. Heat can travel from one place to another in three ways:
• Conduction
• Convection
• Radiation
Both conduction and
The study of science is Physics. Physics means the natural science which involves the study of things made up atoms or matter, and along with related concepts such as energy and force. The experiment is Physics because we are using heat from the sun, and transferring the heat to the oven. So heat or thermal energy is the measure of the amount of energy that is contained in a material. Heat depends on how much of the material, which would be sunlight, you have: if you have twice the amount then normal of whatever you are testing, then you have to double the amount of heat you have. “Temperature is a measure of the ability of a substance, or more generally of any living or nonliving subject, to move the energy made of heat to another living or nonliving subject.” “But we need to remember that light slows down has it goes farther from the sun, and bends toward the normal and has a shorter wavelength when it enters a higher value medium (A substance that makes it possible for the energy to move to one location to another)”. “ Also a light wave is transverse (they can be polarized).”
Heat: The amount of energy associated with the movement of atoms and molecules in matter.
The heating system of a house works to keep the temperature constant. If the house gets too cold,
605). Energy cannot be created or destroyed; it only changes form. There are several sources of heat. These sources are chemical, mechanical, electrical, and nuclear.
3. Convection the transfer of heat through currents of gases or liquids. (occurs passively as warmer air at the surface of the body rises away from the body and is replaced by cooler air – process is aided by wind or fans)
Energy is a concept.� Most definitions of the word energy fail to provide its exact meaning when applied to scientific matters.� In science the word energy is a concept that expresses two measurable properties, heat and work.� Here is the relationship of energy, heat and work:
American Heart Association (AHA) estimates that nearly 700 Americans die each day of sudden cardiac arrest (MI), or 250,000 every year, as many as 50,000 lives could be saved each year if certain critical interventions were made. (Freeman , 50) A patient who receives early life support measures and defibrillation within one to five minutes of arrest is much more likely to live and to retain normal brain function. The brain is often at a serious risk for irreparable brain damage related to anoxia and many other co-morbidities that are associated with cardiac arrest (MI). When a perfusing cardiac rhythm returns after a heart attack, the most important objective is to preserve brain function. The AHA and the Advanced Life Support Task Force of
There are four basic components for thermal energy (heat): 1. All matter is made up of tiny particles called atoms. These can only be seen with special microscopes. 2. The atoms are always moving – they all have kinetic energy. 3. The particles have space between them. Different states of matter have different amounts of space. 4. Adding heat (energy) to matter makes the particles move more quickly. Since faster moving things have more kinetic energy, adding heat increases the energy of the particle. 5. Cooling it down decreases the amount of kinetic energy and slows the movement down.
Radiation The combined process of emission, transmission, and absorption of heat energy traveling through electromagnetic waves from an area of higher heat energy to an area of lower heat energy. A good example is the transfer of solar heat from the sun to the earth. The heat energy is moved through waves from an area of higher temperature (sun) to an area of lower temperature (earth).
What is there was an effective, healthier way to treat breast cancer? One with limited effects? According to the National Cancer Institute, hyperthermia is a type of treatment in which body tissue is raised to very high temperatures. It can kill or damage the cancer cells. Hyperthermia can shrink tumors by destroying proteins within the cells. Hyperthermia is a healthier way to treat breast cancer because it is safer, it is more natural, and it could help to cure other cancers in the future.
Thermal energy is the energy a substance or system has related to its temperature. This means the energy of moving or vibrating molecules. Atoms and molecules are always in motion. Generally the motion of thermal energy cannot be seen, but instead the effects it has on the substance can be seen or felt. Thermal energy can have several different uses. It can be used to heat homes, cook food, and generate electricity.
The concept of using radiant and convection heat for comfort has been around since early man. People chose south facing caves because the sun would warm up the rocks during the day and radiate the heat into the cave at night. The flames from a fire also gave off radiant heat. Technology has developed to control radiant and convection heat. Radiant heating and cooling (RHC) systems utilize the surrounding surfaces as heating and/or cooling sources. Generally, RHC systems are systems that radiant heat transfers cover more than 50% of heat exchange within a specified space. Compared to all-air systems, which depend on convection only, the RHC system provides heating and cooling by the combination of radiation and convection in a building. There are three types of radiant floor heating systems. The first type is a radiant air floor, where the air is the heat-transferring medium. The second type is electric radiant floor. The last type is hydronic radiant floor, which uses hot water.
Heat is a form of energy that is transferred between two substances at different temperatures. The flow of the energy is from the object of higher temperature to the object of lower temperature. The heat is measured in units of energy, usually calories or joules. Temperature on the other hand, is how cold or hot an object is. The temperature is the average kinetic energy per molecule of a substance. This is measured in degrees on the Celsius or Fahrenheit or in Kelvins.
There are no definite forms of energy since possibilities of new forms of energy are limitless. However, the various forms of energy in physical science include thermal, chemical, electric, radiant, nuclear, magnetic, elastic, sound, mechanical, and luminous energies (Foland 13). Thermal energy or heat is the energy in random motion of particles. Chemical energy refers to the energy from the aggregate of positioning of electrons and protons. Radiant energy is the energy of electromagnetic radiation while nuclear energy and electric potential energy is energy emanating from nuclear fission and electrical processes respectively. Sound is a form of mechanical vibration, which propagates through any mechanical medium. It is closely related to the ability of the human ear to perceive noise.
There is a serious situation is occurring on planet Earth that is causing a significant and harmful effect on communities, health, and the climate. It is Global Warming which can be defined as the constant heating of Earth 's surface, oceans and atmosphere. In order to understand global warming, the most important basic is to figure out how the of greenhouse effect plays an important part in its development. The greenhouse effect is caused by increased levels of carbon dioxide (CO2) that trap heat in the atmosphere that keeps the Earth warm. The information this text will discuss is the meaning of global warming, the causes, and most importantly how citizens can help to rectify the situation. Humanity must tickle this problem immediately before the consequences increase and affect the entire planet.