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Heat energy
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Have you ever wondered how a jet aircraft lifts its tremendous weight off the ground, or what gives a runner the stamina to reach the finish line in a race? In order to answer all these questions we must talk about the transformation of one sort of energy into another. The jet aircraft gets its power from jet turbines. These powerful jet engines create a high-pressure stream of very hot gases that push the aircraft forward as they leave the engine. This is an example of heat being transformed into movement. This is sometimes described as
Mechanical Energy. However, this transformation could not take place without the fuel that the aircraft gets within its wings or fuselage. Fuel is considered a chemical energy. This diagram shows how the jet engine acts as energy to lift the aircraft off the surface of earth. Fuel can take the form of gases, solids or liquids. When fuels combine with oxygen from the air, they release their stored energy as heat. We recognize this process as burning. The individual relies on food for fuel which contains energy-giving substances that our bodies can store until we need this energy to use our muscles. When we do use our muscles within us, we may not always be sure that heat is given off. Our bodies do not burst into flames but the perspiration on our skin is a clue to what is happening. The movement of the windsurfer has a different explanation. The windsurfer is propelled along by a sail which collects mechanical energy from the winds that sweep along the water. This energy has been produced by the sun which warms the earth's surface and sets the air above in motion. The sun's heat comes to the earth as a form of radiant energy. When the heat reaches the surface of the earth, it causes the land or seas to rise in temperature. The sun is very hot. Infact, the center of the sun can reach temperatures of up to
27 million degrees Fahrenheit. This is because of another kind of energy reaction where new substances are continually being created as others are being destroyed. This reaction is known to us as the Nuclear Reaction. Today we are trying to imitate this reaction in improving our energy supply. Scientists have calculated that the sun has enough fuel to go on producing energy at its present rate for about five billion years. On earth
In the various themes of flight, one way can be referred to as actual physical flight, to fly in the air with wings. In “A Wall of Fire Rising” Guy took physical flight in the hot air balloon, soaring high above the rest of the village in hopes to fly away. Another way flight can be described as more figurative,
The degree to which a demand or supply curve reacts to a change in price is the curve's elasticity (Reem Heakal, 2015). Elasticity differs between products because some products could be more important to the consumer. Products that are necessities will be more insensitive to price changes since buyers would keep on purchasing these products regardless of price increases. Alternatively, a price increase of a good or service which is regarded less of a requirement will discourage more consumers because the opportunity cost of buying the product will become too high.
1. The positive outcomes of having a total force far outweigh the negative impacts. This paper will talk about the effectiveness and efficiency of the total force, the overuse of the reserve component and its effects on members of the force, and how civilian trained reserve personnel add diversity and a well-rounded force.
The Effect of Mass On a Spring Aim: I am doing this experiment to find out what effect mass has on a spring. In order to find out how the spring extends we will need to add various amounts of weights to the spring. Apparatus: Ÿ Stand Ÿ Clamp Ÿ Spring Ÿ Weights (Newton's) Ÿ Metre Ruler Ÿ Goggles Diagram: Method: Once I have all my apparatus set up like above, I will measure the spring on its own to find its original length. Once I have written down the measurement in mm's, I will add 1 Newton onto the bottom of the spring.
Bottle rockets are great models to examine Newton’s three laws of motion. The bottle rocket will remain on the ground until an unbalanced force, water, thrusts the rocket upward. This is defined by Newton’s first law of motion: an object at rest stays at rest or an object in motion, stays in motion (in the same direction/at the same speed) unless acted upon by an unbalanced force. It is also known as the law of inertia.
The basic concepts of lift for an airplane is seen. The air that is flowing splits to move around a wing. The air that that moves over the wing speeds up creating lower pressure which means that the higher pressure from the air moving slower under the wing pushes up trying to equalize the pressure. The lift generated can be affected by the angle at which the wing is moving into the flowing air. The more surface area of the wing resisting against the flow of air can either generate lift or make the plane dive. This can be easily simulated in everday life. Next time you are riding in a car with someone stick your hand out the window. Have your fingers pointing in the direction of the motion of the vehicle. Now move your hand up and down slightly. You can feel the lift and drag that your hand creates.
[4] Mathematically, torque can be defined as the cross product of the distance vector; r and the force vector, ‘θ’ being the angle between r and F. (refer Figure 3) Torque is defined as = r F sin (θ).
In order for a system to gain energy the surroundings have to supply it, and visa versa when the system looses energy the surroundings must gain it. As the energy is transferred it can be converted form its original form to another as the transfer takes place, but the energy will never be created or destroyed. The first law of thermodynamics, also known as the law of conservation of energy, basically restates that energy can’t be destroyed or created “as follows: the total energy of the universe is a constant.” All around the conservation of energy is applied. When gasoline burns in the engine of a car, an equal amount of work and heat appear as the energy is released. The heat from the engine warms its surroundings, the cars parts, the air, and the passenger area. The heat energy is converted into the electrical energy of the radio, chemical energy of the battery, and radiant energy of the lights. The change in the sum of all of the energies formed from the burnt gasoline would be equal to the “…change in energy between the reactants and products.” Biological processes, like photosynthesis, also follow energy conservation. The green plants convert the radiant energy emitted by the Sun into useful chemical energy, such as the oxygen that we breathe. The energy transferred between any surroundings and any system can be in the form of various types of work, chemical, mechanical, radiant, electrical, or heat.
In Chapter 14 (Kinetics of a Particle: Work and Energy) and Chapter 18 (Planar Kinetics of a Rigid Body: Work and Energy), both apply a same concept. It is concept of work and energy to solve the problem. Chapter 14 use the concepts of work and energy to analyze motion of a particle, while Chapter 18 apply work and energy methods to solve planar motion problems. In both chapter, problems that involve force, velocity, and displacement can be solve by using the resulting equation.
A wind turbine is a device that converts kinetic energy from the wind into mechanical energy. If the mechanical energy is used to produce electricity, the device may be called a wind generator, wind charger or wind turbine. If the mechanical energy is used to drive machinery, such as for grinding grain or pumping water, the device is called a windmill or wind pump (Niki 2007). Today modern wind turbines typically have three blades. The blades are usually colored light gray to blend in with the clouds and range in length from 20 to 40 meters or more. The tubular steel towers range from 60 to 90 meters tall. The blades rotate at 10-22 revolutions per minute. At 22 rotations per minute the tip speed exceeds 91 meters per second (Rosenbloom, 2006). The modern horizontal-axis, three-bladed wind turbine can be divided into three main components. First, the rotor component, which includes the blades for converting wind energy to low speed rotational energy. Second is the generator component, which includes the electric generator, the control electronics, and most likely a gearbox component for converting the low speed incoming rotation to high speed rotation suitable for generating electricity. The control system engages protective features to avoid damage at high wind speeds. Finally, the structural support component includes the tower and rotor yaw mechanism that turns the turbine towards the wind. (Office of Energy Efficiency and Renewable Energy, 2006)
Σ(Ex) ̇_(mass,out) =( Ex) ̇_(H_(2,out) )+(Ex) ̇_(O_(2,out) )+(Ex) ̇_(H_2 O,pro)=〖 (n ̇×ex)〗_(H_(2,out) )+(n ̇×ex)_(O_(2,out) )+(n ̇×ex)_(H_2 O,pro)
These four forces affect all things that fly such as airplanes, helicopters, birds, and rockets. The four forces are: lift, thrust, drag, and weight. Lift is created by wind moving across the kite. The way it's created is as the wind moves across the top of the kite the wind has to move faster than the wind under the kite. Since the wind on the top of the kite is moving faster than the air on the bottom, it has more pressure on the bottom than it has on the top. The air likes to move from higher pressure to low pressure and that's what causes the kite to
Thermodynamics is basically concerned with heat transfer, energy transfer and conversion between heat and work and is also applied to describe phase change of a substance, such as condensation and evaporation.
On January 4, 1643 in Woolsthorpe, England, one of the world’s greatest mathematician and physicist was born. At the age of 12 he began to attend King’s School, up until his mother pulled him out to become a farmer. Due to his lack of being successful in farming, he was sent back to school to finish his basic education. Later Newton entered into the University of Cambridge, and during his time there Newton became interested in the sciences and began to write a set of notes called, “"Quaestiones Quaedam Philosophicae", also called, “Certain Philosophical Questions" which in time would provide to be “the backbone of the Scientific Revolution,” (Bio.com). Newton ended up graduating from Cambridge with the title of a scholar. Due to a breakout
Whilst there are clear arguments for and against nuclear energy, the future is promising; with scientists working on potential breakthroughs such as nuclear fusion, and the design of newer and better and reactors. Nuclear fusion is a reaction which causes the nuclei of atoms to collide and form a new atomic nucleus. It is essentially what heats the sun and stars and would produce no long-lived radioactive waste.22 If scientists could control the process of atomic fusion then it could become a never ending energy source for future use.