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thermal energy

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Luke Altermatt

on 19 October 2012

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Transcript of thermal energy

Energy The sun is the biggest source of energy known to mankind. There are many different kinds of energy.
Energy can be converted in many different ways. It can be converted by wind mills, solar panels, generators, water tides, and pressure. By Luke Altermatt
Bear Nunley How it Works Potential energy is stored energy that has the potential to move. One example of potential energy is a fish bowl. The fish bowl has water in it that has the potential to move water or have fish in it. Potential Energy Thermal Energy The sun's huge geothermal nuclear furnace supplies the heat and light that is essential to life. The nuclear fusion in the sun increases the sun's thermal energy. Once the thermal energy leaves the sun (usually in the form of radiation) it is called heat. Heat is the thermal energy transfer. Thermal energy is part of the internal energy of many systems and ecosystems. In this experiment we placed four foil balls outside. (One in a bag on the dull side, one in a bag on the sharp side.) (Then we have one without a bag on the sharp side, one without a bag on the dull side.) By doing this it shows how different climates can heat and cool different items. Experiment Kinetic Energy This is the energy of motion. There are many forms of kinetic energy - vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and translational (the energy due to motion from one location to another). Kinetic energy expresses the fact that a moving object can do work on anything it hits. The total mechanical energy of an object is the sum of its kinetic energy and potential energy. If the object is moving the kinetic energy equals one half times the mass (m) of the object times (t) the square of the speed (v) of the object:
E=1/2*m*v2 Mechanical Energy The energy acquired by the objects upon which work is done is known as mechanical energy. In physics, mechanical energy describes the sum of potential energy and kinetic energy present in the components of a mechanical system. Mechanical energy is the energy associated with the motion or position of an object. Mechanical energy is the ability to do work. Elastic Energy Elastic energy is a potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring, which depends upon the spring constant k as well as the distance stretched. According to Hooke's law, the force has the form:F=-k*x Gravitational Energy Energy that is stored in the gravitational field is called gravitational potential energy, or potential energy due to gravity. Gravitational (or gravitational potential energy) is the energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2. Electrical Energy All matter is made up of atoms, and atoms are made up of smaller particles, called protons (which have positive charge), neutrons (have neutral charges), and electrons (which are negatively charged). Electrons orbit around the nucleus of atoms, just like the moon orbits the earth. The nucleus is made up of neutrons and protons. Some material, particularly metals, have certain electrons that are only loosely attached to their atoms. They can easily be made to move from one atom to another if an electric field is attached to them. When those electrons move among the atoms of matter, a current of electricity is created. sharp in bag-hottest
dull in bag-next hottest
dull on stick-next hottest
sharp on stick-least hottest Thanks for watching our presentation Now applaud!!!!!! This year, our last year in gate, we have learned many different things, but here are a few of our favorite. #1 thermal energy: we have learned that the sun is the biggest energy source. #2 potential energy: is the energy that has potential to move.#3 kinetic energy: equals half the mass of an object times half the speed= kinetic energy. #5 elastic energy: the product of when elastic is stretched out to return to its normal form.#6 gravitational energy: is the energy when something goes up it must always come down.#7 electrical energy: electric energy is the energy. What we have learned
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