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Energy
The Energy category covers the description, definition, and use of all types of energy. Questions of a general nature can be put in the general Energy category. Other sub-categories exist for Fossil fuels, Nuclear energy, and renewables such as Wind, Solar, Hydro, Tidal, and Wave power.
24,905 Questions
Where does the energy for geothermal nuclear and tidal come from?
1. Geothermal - comes from the earth's internal heat. Opinions differ somewhat on where this comes from, but it seems to be accepted that this is partly heat left from the very hot rocks the earth was formed from, and partly from radioactivity deep in the earth.
2. Nuclear - comes from fission of nuclei of uranium and plutonium, which releases energy because mass is destroyed.
3. Tidal - comes from gravitational effects of the sun and moon on the oceans
Elements whose atoms can combine to form compounds?
Reactive elements have atoms that can combine to form compounds. The atoms in a compound are combined through different types of bonds, such as ionic, covalent, hydrogen, and metallic bonding. With ionic bonding, there is an exchange of electrons between atoms. Covalent bonding occurs when electrons are shared by two atoms.
What everyday object uses all forms of potential energy?
An everyday object that uses all forms of potential energy is a wind-up alarm clock. It stores energy in the form of mechanical potential energy when it is wound up, gravitational potential energy when placed at a height, and elastic potential energy in its spring mechanism.
What happens to the thermal energy of a substance during a physical change of state?
it will increase or decrease depending on the states.
from solid --> liquid or liquid --> gas it is positive and endothermic, and thermal energy is increasing
from liquid --> solid or gas --> liquid it is negative and exothermic, and thermal energy is decreasing
What temperature should the home be in winter?
A comfortable indoor temperature in winter is typically around 68-72 degrees Fahrenheit. However, personal preferences can vary, so it's essential to find a temperature that suits your household while also considering energy efficiency. Using a programmable thermostat to lower the temperature when you're sleeping or away can help save on heating costs.
What parts of the world are biggest emitters of greenhouse gases and why?
Greenhouse gases are formed by burning fossil fuels, so it is the parts of the world that burn most. That means North America, Europe, and China.
1st - China is the biggest polluter with 7,527 MtCO2e in 2007 and -47MtCO2e thanks to reforestation (2000).
2nd - US emitted 7,282 MtCO2e (2008) and -403MtCO2e thanks to reforestation (2000)
3rd - EU emitted 5,045 MtCO2e (2009) and -24MtCO2e thanks to reforestation (2000)
4th - Indonesia 451MtCO2e (2007) and +2,563MtCO2e due to deforestation (2000)
5th - Russia 2,192MtCO2e (2009) and +54MtCO2e due to deforestation (2000)
6th - Brazil 659MtCO2e (2005) and +1,372MtCO2e due to deforestation (2000)
7th - India 1,214MtCO2e (2005) and -40MtCO2e thanks to reforestation (2000)
for more information:
http://reducecarbon.wordpress.com/chapter-iv-the-forestry-carbon-market/
In addition, the GHG emissions in the world came from (in 2007):
Energy supply - 25.9%
Industry - 19.4%
Forestry (including deforestation) - 17.4%
Agriculture - 13.5%
Transport - 13.1%
Residential and commercial buildings - 7.9%
Waste and wastewater - 2.8%
for more info:
http://reducecarbon.wordpress.com/chapter-iii-the-carbon-market/
What kind of energy does the Earth have?
The Earth has various forms of energy, including geothermal energy from its inner heat, tidal energy from gravitational forces, and solar energy from the Sun. Additionally, the Earth has kinetic energy from its rotation and potential energy from its position in space.
In photosynthesis energy combines with carbon dioxide and water to form?
Photosynthesis is a very complex process performed by plants.
Overall, carbon dioxide, oxygen, and the presence of light allows plants to form glucose (or other organic compounds) and release oxygen.
How does frequency affect the pitch of sound?
In my book the pitch of sound is the frequency. Musicians have different names for pitch, like middle C or F sharp, but they all correspond to certain frequencies.
The answer above is not correct it is totally unsenceable
What do you do when an energy efficient light bulb breaks?
When an energy-efficient light bulb breaks, it is important to handle it carefully to avoid exposure to any hazardous materials. Wear gloves and a mask, clean up any broken glass using a damp paper towel, and place the debris in a sealed plastic bag. Check with your local waste disposal regulations for proper disposal instructions as energy-efficient bulbs may contain trace amounts of mercury.
What is the unit you use for energy?
1 Joule is the amount of energy required to move a weight of 1 newton a distance of 1 meter (also known as a newton-meter). It is also used as the unit of work, because work is defined as the expending of energy. The abbreviation is J. It is approximately the amount of energy required to lift a small apple 1 meter above the ground.
A2: strictly speaking a Newton is a force rather than a weight, the weight of an object is the product of its mass and the gravitational constant G (9.81 m/sec2). The Newton is the force required to accelerate a mass of 1 Kg at 1 m/sec2.
The actual cost of producing power will vary from power plant to power plant with one of the main variables being the size of the plant. For example, since it could take many people to operate and maintain such a small one unit generator as it would to operate and maintain two larger generators, the cost of operation and maintenance per kilowatt produced would be higher for the smaller plant. In general, the larger the hydroelectric plant, the cheaper one would cost per kilowatt to produce the electricity. When compared to other means of producing electricity, hydroelectric production costs run only about one third those of either fossil-fueled (coal or oil) or nuclear power plants, and is less than one fourth the cost of gas turbine electricity production. The main contributing factor for the difference in this cost of production is the fuel costs for the other means of producing electricity. The original plant cost for a hydroelectric plant is somewhat cheaper than either fossil fuel or nuclear plants.
Geothermal energy is considered a good source of renewable energy because it is sustainable, does not produce greenhouse gas emissions, and can provide constant power. However, there are concerns about the environmental impact of geothermal plants, such as possible land subsidence and water pollution. Overall, when managed properly, geothermal energy can be a beneficial alternative to fossil fuels.
How long will it take until humans run out of non renewable fuel?
Since oil, coal, and other fossil fules are created by decayed plants and animals, and plants and animals have been decaying since the begining of time, there will be a continues supply of fossil fuels. We will never run out. The whole thing about running out of oil and whatnot is all rubbish. -Jonhis
Groups of different types of tissues working together are referred to as?
Organs. Organs are composed of different types of tissues that work together to perform specific functions within the body. Examples include the heart, lungs, and liver.
Natural gas is nontoxic to humans in its natural state. However, in high concentrations, natural gas can displace oxygen, leading to asphyxiation. Additionally, natural gas is highly flammable and can be dangerous if not handled properly.
Where can you get Natural Gas?
If you're looking for a natural gas supplier, you can sign up with an ESCO. The energy supply company will purchase the gas at low rates and deliver it to the utility company for you, so you can save money on the Natural Gas used for the utilities in your home.
How do you use geothermal power?
Heat is sitting under the Earth -- we just need to tap it. Geothermal energy can be used in three ways:
Direct geothermal energy. In areas where hot springs or geothermal reservoirs are near the Earth's surface, hot water can be piped in directly to heat homes or office buildings. Geothermal water is pumped through a heat exchanger, which transfers the heat from the water into the building's heating system. The used water is injected back down a well into the reservoir to be reheated and used again.
Geothermal heat pump. A few feet under the ground, the soil or water remain a constant 50 to 60 degrees Fahrenheit (10-15 degrees Celsius) year-round. Just that little bit of warmth can be used to heat or cool homes and offices. Fluid circulates through a series of pipes (called a loop) under the ground or beneath the water of a pond or lake and into a building. An electric compressor and heat exchanger pull the heat from the pipes and send it via a duct system throughout the building. In the summer the process is reversed. The pipes draw heat away from the house and carry it to the ground or water outside, where it is absorbed.
Geothermal power plant. Hot water and steam from deep underground can be piped up through underground wells and used to generate electricity in a power plant. Three different types of geothermal power plants exist:
- Dry steam plants. Hot steam is piped directly from geothermal reservoirs into generators in the power plant. The steam spins turbines, which generate electricity.
- Flash steam plants. Water that's between 300 and 700 degrees Fahrenheit (148 and 371 degrees Celsius) is brought up through a well. Some of the water turns to steam, which drives the turbines. When the steam cools it condenses back into water and is returned to the ground.
- Binary cycle plants. Moderately hot geothermal water is passed through a heat exchanger, where its heat is transferred to a liquid (such as isobutene) that boils at a lower temperature than water. When that fluid is heated it turns to steam, which spins the turbines.
What is energy from the burning of organic material?
If by 'organic' material you mean recently growing plant material, this would be classed as biomass.
In chemistry fuels such as oil are classed as organic, but I feel you may not mean that.
What are the energy transfer for fossil fuel power plants?
When a fossil fuel is burned chemical energy that is stored within the fuel is released via combustion. This then turns into steam which turns turbines to form electrical energy.
So Chemical to heat to mechanical to electrical
Where is geothermal energy being use right now in the world?
Geothermal energy is currently being used in countries like the United States, Iceland, Philippines, and Indonesia. These countries utilize geothermal power plants to generate electricity by harnessing heat from beneath the Earth's surface. Additionally, geothermal energy is used for heating and cooling purposes in various regions around the world.
What is stored in the bonds of organic compounds?
As with all molecules, the chemical energy is stored in the covalent bonds between each atom in the molecule.
What are some disadvantages of electrical energy?
Electricity is mainly produced by burning fossil fuels, coal, oil and natural gas. When burnt these all produce carbon dioxide which contributes to the layer of greenhouse gas in the atmosphere.
These organisms break down material into nutrients for food producers?
Decomposers such as bacteria and fungi break down organic material into nutrients like nitrogen and phosphorus that can be absorbed by plants. This nutrient recycling process is essential for maintaining healthy soils and supporting food production by making these nutrients available to plants.
