Green Energy
- All 19 Women Failed Army Ranger Training
I don't know, she looks pretty good to me ... From Truth Revolt: Nineteen women signed up for the first gender-integrated class of Army Ranger training, and all of them failed to complete the first phase. A Fort Benning release stated that eight...
- Leaked Copy Of U.n. Climate Change Report Shows Agency Struggling To Explain Why Global Warming Has Been Non-existant Over Last 15 Years
An unreleased draft of the U.N.’s next major climate report reportedly states that scientists are more certain than ever that man’s actions are warming the planet — even as the report struggles to explain a slow-down in warming that climate skeptics...
- Solar Energy: The Energy That Comes From Outer Space
Solar energy is a clean energy as it generates neither greenhouse gas emissions nor pollution. Today, solar energy represents less than 1% of all energy produced by humans and Germany is the country that produces the most. There are two technologies for...
- Heat And Internal Energy
Heat is defined as the transfer of energy across the boundary of a system due to a temperature difference between the system and its surroundings. When you heat a substance, you are transferring energy into it by placing it in contact with surroundings...
- Absolute Zero
Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. Absolute zero is the point at which the fundamental particles of nature have minimal vibrational motion, retaining only quantum mechanical,...
Green Energy
Latent Heat
A substance often undergoes a change in temperature when energy is transferred between it and its surroundings. There are situations, however, in which the transfer of energy does not result in a change in temperature. This is the case whenever the physical characteristics of the substance change from one form to another; such a change is commonly referred to as a phase change. Two common phase changes are from solid to liquid (melting) and from liquid to gas (boiling); another is a change in the crystalline structure of a solid.
All such phase changes involve a change in internal energy but no change in temperature. The increase in internal energy in boiling, for example, is represented by the breaking of bonds between molecules in the liquid state; this bond breaking allows the molecules to move farther apart in the gaseous state, with a corresponding increase in intermolecular potential energy.
If a quantity Q of energy transfer is required to change the phase of a mass m of a substance, the ratio { L = Q/m } characterizes an important thermal property of that substance. Because this added or removed energy does not result in a temperature change, the quantity L is called the latent heat (literally, the “hidden” heat) of the substance.
Latent heat of fusion Lf is the term used when the phase change is from solid to liquid.
Latent heat of vaporization Lv is the term used when the phase change is from liquid to gas.
- All 19 Women Failed Army Ranger Training
I don't know, she looks pretty good to me ... From Truth Revolt: Nineteen women signed up for the first gender-integrated class of Army Ranger training, and all of them failed to complete the first phase. A Fort Benning release stated that eight...
- Leaked Copy Of U.n. Climate Change Report Shows Agency Struggling To Explain Why Global Warming Has Been Non-existant Over Last 15 Years
An unreleased draft of the U.N.’s next major climate report reportedly states that scientists are more certain than ever that man’s actions are warming the planet — even as the report struggles to explain a slow-down in warming that climate skeptics...
- Solar Energy: The Energy That Comes From Outer Space
Solar energy is a clean energy as it generates neither greenhouse gas emissions nor pollution. Today, solar energy represents less than 1% of all energy produced by humans and Germany is the country that produces the most. There are two technologies for...
- Heat And Internal Energy
Heat is defined as the transfer of energy across the boundary of a system due to a temperature difference between the system and its surroundings. When you heat a substance, you are transferring energy into it by placing it in contact with surroundings...
- Absolute Zero
Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. Absolute zero is the point at which the fundamental particles of nature have minimal vibrational motion, retaining only quantum mechanical,...