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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

How is electricity made in a way that doesn't harm the environment?

All human activity impacts the environment. The line between impacts and harms is difficult to establish. In the case of electricity generation there are several ways of generating electricity each with its own set of impacts. These are: * Thermal fired generating plants: Systems in which some material coal, gas, biomass is burned can cause thermal pollution of water ways, use water taking it away from other users, have emissions problems (soot, carbon dioxide, nitrogen oxides, sulfur oxides) and have waste disposal issues. Fuel sourcing may entail environmental disruption, processing, transportation and handling issues. The common problem of building the plant and infrastructure exists. * Natural Origin Thermal Power Systems: Steam is recovered from geothermal features (geysers etc.) and used to produce electricity. This is limited to specific geological formations and locations. The common problem of building the plant and infrastructure exists. * Nuclear Thermal Power Systems:Systems in which some radioactive (fissionable) material is used to heat water to steam can cause thermal pollution of water ways, use water taking it away from other users. Fuel sourcing may entail environmental disruption, processing, transportation and handling issues. Waste handling is a significant issue. The common problem of building the plant and infrastructure exists. * Hydroelectric Power Plants: Electricity is created by water pressure or water falling over a cliff. The dams and reservoirs built for these systems disrupt ecosystems over large ares including fish migration as well as being a source of methane (a greenhouse gas) due to anaerobic decomposition. In the case of waterfalls the system diverts or disrupts water flows and fish migration. The common problem of building the plant and infrastructure exists. * Solar Power Systems: Electricity is generated by banks of solar cells. Large installations may require hundreds of acres. The sourcing of materials required for construction of solar panels requires mining and manufacturing issues involving toxic materials. The common problem of building the plant and infrastructure exists. * Wave Power Systems: Electricity is generated by banks of small units powered by the oscillation of waves. Large installations may require hundreds of acres. There is fear that fish, sea mammals and navigation may be impacted by the installations. The common problem of building the plant and infrastructure exists. * Wind Power Systems:Electricity is generated by rows of wind turbines. Large installations may require hundreds of acres. The sourcing of materials required for construction of wind turbines requires mining and manufacturing issues involving toxic materials. There is fear that birds and bats may be impacted by the installations. The common problem of building the plant and infrastructure exists. * Tidal Power Systems: Electricity is created by water pressure or water collected by dikes in tidal estuaries. The dams and reservoirs built for these systems disrupt ecosystems over large areas including fish migration, as well as the diversion or disruption of water flows. The common problem of building the plant and infrastructure exists. * Fuel Cells: Oxidants and fuel are brought together in a catalytic cell to generate electricity. If the fuel is hydrogen the generation of that material requires other polluting sources. If the fuel is methane or other hydrocarbon the cell produces carbon dioxide as well as being produced in some other polluting process. The common problem of building the plant and infrastructure exists. All in all the best source for electricity is probably Natural Origin Thermal Power generation.

If the specific heat of aluminum is 0.902 and the specific heat of copper is 0.268 what makes copper a better choice to use for hot water lines in your house?

This means that copper will not absorb the heat from the water as much as the aluminum. Aluminum will "steal" more heat from the water- which you do not want. You need the heat to stay with the water until it serves its purpose.

Where at is geothermal energy commonly used?

Geothermal energy is commonly used in regions with tectonic plate boundaries, such as along the Ring of Fire in the Pacific Ocean and in countries like Iceland, the United States, the Philippines, and New Zealand. These regions have access to high temperatures and abundant geothermal resources that make it feasible to harness geothermal energy for electricity generation and heating.

What are two main forms of energy that power living systems?

The two main forms of energy that power living systems are chemical energy stored in molecules like glucose, which is used during cellular respiration to produce ATP, and light energy absorbed by chlorophyll in plants during photosynthesis to create glucose.

True or false when the particles of an object move faster its thermal energy increases?

this is true because thermal energy has kinetic energy and kinetic energy is the energy of motion. AND................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... IF YOU DIDN"T KNOW THS BY NOW THEN YOU NEED TO READ A BOOK DUDE CAUSE YOU MIGHT BE SUFFERING FROM MAJOR STUPIDY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! =D LOLZ!!!! jk! I didn't even know that until I looked it up on google so no hard feelingd peeps l8ter!!!!!!!!!!!!!!!!!!!!!

How does energy move from the geosphere through the atmosphere?

Energy from the geosphere is primarily transferred to the atmosphere through processes like radiation and conduction. Solar radiation heats the Earth's surface, which in turn heats the air above it. This warmed air rises due to convection, transferring energy to the atmosphere.

What energy sources are used in space travel?

Spacecraft typically use a combination of chemical fuels (such as liquid hydrogen and oxygen), solar panels to convert sunlight into electricity, and radioisotope thermoelectric generators (RTGs) which use the heat produced by radioactive decay to generate power. Nuclear power sources may also be used for long-duration missions.

What are uses for geothermal power plants?

Geothermal power plants are used for anything. Since they generate electricity by using the heat of the earth, they can be used to power communities. Anything that needs electricity could use a geothermal power plant and it is one of the cleanest forms of power generation yet.

Furthermore, some large factories use geothermal heat to heat their factories. This is achieved in a similar fashion as geothermal power plants but instead of heating the water to steam underground, it is only heated enough that it does not biol. This heated water is then sent thoughout tubes around the factor and the heat dissipates into the air heating it.

How deep are oil wells?

Oil wells can range in depth from a few hundred feet to over 30,000 feet, depending on the location and geology of the oil reservoir. In some cases, offshore wells can be even deeper, reaching depths of over 50,000 feet.

What is an open dump?

An open dump is a site where trash is disposed of in an unsystematic and uncontrolled manner, often without environmental protections or regulations in place. It can pose serious health and environmental risks due to contamination of soil, air, and water sources.

What is the difference between btus and joules?

1 BTU is the energy required to heat 1 pound of water by 1 degree F. 1 Joule is defined mechanically, but in thermal terms it is 1/4.2 of a calorie (4.2 Joules/calorie), and 1 calorie is the energy required to heat 1 gram of water by 1 degree C. In fact 1 BTU = 1055 Joules.

What is geothermal activity?

Geothermal activity refers to the heat generated within the Earth's crust, which manifests itself through phenomena like geysers, hot springs, and volcanic activity. This heat originates from the Earth's core and is driven by the decay of radioactive elements. Geothermal energy can be harnessed and used for various applications, such as electricity generation and heating.

Energy and earths resources?

Earth's resources are finite, and the way we extract and use energy from them can have negative impacts on the environment. It is important to shift towards renewable energy sources and sustainable practices to reduce our reliance on non-renewable resources and minimize harm to the planet. By promoting energy efficiency and conservation, we can help preserve Earth's resources for future generations.

What part of all cells makes energy?

Are we talking about eukaryotic or prokaryotic cells?

In prokaryotic cells (bacteria) the cell membrane is the site of the electron transport chain which makes the cells energy currency known as ATP (adenosine-triphosphate)

In eukaryotic (plants, animal) cells the major source of energy (ATP) is produced by the mitochondria.

Can lightning be absorbed and be changed into energy?

Lightning causes a very sudden discharge of energy to occur in a place that is very difficult if not impossible to predict, so I don't see how equipment to receive it and store the energy could be positioned in the right place at the right time. Apart from that, because it is such a rapid discharge, what sort of equipment could store the energy? Some sort of large capacitor perhaps, but it would be like trying to absorb and save the energy from a chemical explosion.

Does an atom's nucleus hold a large amount of kinetic energy?

Yes, the nucleus of an atom holds a large amount of potential energy due to the strong nuclear forces binding the protons and neutrons together. This potential energy can be released as kinetic energy during nuclear reactions.

How do you use geothermal in a sentence?

Geothermal energy is generated by harnessing heat from beneath the Earth's surface through geothermal power plants. Many countries are investing in geothermal technology to produce electricity and heat buildings in an environmentally friendly way.

What is one advantage of geothermal energy over wind energy?

One advantage of geothermal energy over wind energy is that geothermal energy is more consistent and reliable, as it is not dependent on wind availability. Geothermal energy also has a smaller footprint and visual impact compared to wind turbines, making it more suitable for certain locations.

Why is electricity a form of kinetic energy?

I believe electrical energy is considered potential energy and not kinetic. Kinetic energy is when an object is moving, electrical energy is a stored energy that can be converted to kinetic energy.

What Ancient blank reveal magnetic field blank from long ago?

Ancient pottery reveal magnetic field changes from long ago. By studying the alignment of magnetic minerals in the pottery, researchers can reconstruct past magnetic field intensity and direction, providing insights into the Earth's magnetic field history.

On he basis of nutrition how many types of bacteria are there?

There are three main types of bacteria based on nutrition: heterotrophic bacteria obtain nutrients from organic compounds, autotrophic bacteria can manufacture their own food using inorganic compounds, and saprophytic bacteria obtain nutrients from decaying organic matter.

What is the word used for describing how much water there is per month or year?

The term used to describe the amount of water that falls or accumulates in a specific location over a period of time, such as a month or year, is "precipitation."

How much energy does a person use in a year?

In the USA we consumed about 3.479 trillion [million million] kWh of electricity in 2003. If you estimate 300 million people, that would mean we each used over 10,000 kWh that year. This assumes that we each consumed our equal share of all electricity produced, even if some of it was used to make the can your soda is in, or the tires on your car. The quantity used goes up if you allow that we import more products than we export, which gives us a "hard" electricity import in power used to make imported sneakers, etc. On the other hand, China, with 1 billion people, used a bit more than a third of the amount we did in 2003, giving them a per capita kWh consumption of 1,300 kWh. Just divide the total used by 365.
The average use per person over a long period is given as 313 watts worldwide, 1363 watts in the USA and 688 watts in Europe. Canada is the highest at 1795 watts and the lowest is Afghanistan, Chad and Sierra Leone with 1 watt each per person.

So the worldwide average of 313 watts gives a daily consumption of 7½ units, varying from 0.024 unit in Afghanistan to 43 units in Canada.