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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

What is the function of upper epidermis in a leaf?

The upper epidermis has several functions. It protects against water loss, regulates gas exchange (there are only a few stomata on the uppermost layer of the leaf) and produces the waxy substance that becomes part of the cuticle.

The previous answer to this question implies that leaves have a SPINAL CORD - note, this is not true!

What is the overall formula for photosynthesis?

The overall formula for photosynthesis is: 6CO2 + 6H2O + light energy -> C6H12O6 + 6O2. This formula represents the conversion of carbon dioxide and water into glucose and oxygen in the presence of light energy, which occurs in the chloroplasts of plant cells.

Why are fossil fuels considered non-renewable?

Because fossil fuels take hundreds of millions of years to form under the Earth's surface. It will take another million years for more to be produced, so we only have a limited supply.

Eventually, more fossils will be made, but by then we will have run out by how much we use them now. If we stop using them so much than we wont die like we are going to.

So essentially, all fossil fuels are considered non-renewable.

What is surface area important for living things?

Surface area is important for living things because it dictates the rate of exchange of materials with the environment. A larger surface area allows for more efficient absorption of nutrients and gases, as well as the release of waste products. This is crucial for processes like respiration, digestion, and photosynthesis to occur effectively.

Does co generation violate the second law of thermodynamics?

No. Co-generation just increases the overall efficiency.

In normal central heating systems a large quantity of heat is lost in the exhaust gas. The flame heats an exchanger which warms the air circulating through the furnace.

In a co-generating plant the flame heats a sink on a thermal-electric device (usually a sterling driven generator). The "cold" side of the device is then cooled by the air circulating through the device.

Who has the most kinetic energy a person running in a race or a plane in flight?

A plane in flight would have more kinetic energy than a person running in a race. This is because kinetic energy is directly proportional to an object's mass and velocity, and a plane's mass and velocity are much greater than that of a person.

What is nonrenewable oil?

Nonrenewable oil is oil that cannot be replaced easily or within a short period of time. It is formed over millions of years from the remains of plants and animals, and once it is extracted and burned, it cannot be replenished within a human lifespan. This makes it a finite resource that will eventually run out.

When you walk upstairs how are you obeying the law of conservation of energy?

Yes. Basically, energy is ALWAYS conserved. In this case, if it takes an extra effort to go up, that's because other type of energy (the energy from your muscles in this case) is converted into gravitational potential energy.

Name 2 units that speed can be measured in?

Speed can be measured in units such as meters per second (m/s) or kilometers per hour (km/h).

Which element has a lower first ionization energy than element S?

Element P (phosphorus) has a lower first ionization energy than element S (sulfur).

What happens when heat is added to liquid water?

When any substance is heated the temperature rises. _____________________ Ordinarily, the above answer is accurate, as far as it goes. But the problem here arises from the fact that the question is unclear. We are not told anything about the amount of heat added to the water. The amount of heat added may be just exactly enough to melt all the ice and no more, it may be more heat than that, or the heat may not be enough to melt all the ice. If you add heat to this system (ice water) and it is not enough to melt all of the ice, then after the system has time to balance the water will remain at zero degrees celsius. The only time the temperature of the water will rise is when more heat is added than is needed to melt all of the ice.

How much energy does 125 watt infrared bulb use?

Any electric lamp should use the amount of energy that is stated somewhere on its body in watts. That wattage could be printed on the glass bulb or on its metal cap and/or on the box it was sold in.

It does not matter if it's an infrared type or any other type of bulb, the wattage it was designed to take is the wattage it should use.

So a 125 watt infrared bulb should use 125 watts of energy.

If the question is really asking how much it costs to run that bulb, then the answer depends entirely on two things:

  • the time the bulb is in use

    and

  • the cost that you have to pay for electrical energy in your locality.

The cost is charged in cents per kilowatt-hour. It may vary according to the time of day or night, depending on the supply service you subscribe to.

If the cost in your area is, say, 15 cents per kilowatt-hour, then running a 125 watt lamp for 2 hours would cost you (125 x 2 x 15) / 1000 = 3.75 cents.

What happens as the molecules in a liquid move around?

As molecules in a liquid move around, they flow past each other, creating a fluid-like behavior. The molecules continuously collide with each other and with the boundaries of the container, leading to the pressure and viscosity characteristics associated with liquids.

Gasoline smell in your house where could it come from?

A gasoline smell in your house could be coming from a gas leak in your appliances, car fumes entering through vents or windows, spilled gasoline, or improperly stored gasoline containers. It is important to immediately identify and address the source to prevent potential safety hazards. Consider contacting a professional to help locate and resolve the issue.

What states that when one form of energy is transformed to another no energy is destroyed?

That's the law of "Conservation of Energy". It says you always end up with the

exact same amount of energy you started out with.

That law has been updated a bit in recent years. There used to be two separate

conservation laws ... one for energy and another one for mass, and they both said

that it couldn't be created or destroyed. Scientists were very worried when they did

some very important experiments, and they saw mass being destroyed and energy

being created! Digging in further, they discovered that energy could change into mass,

and mass could change into energy. That discovery actually made things simpler, because

now, instead of two conservation laws, we only need one. It says that mass and energy

can change from one to the other, but whatever the total (mass + energy) is at the

beginning, the total (mass + energy) must be the same at the end.

But how can you add them up ? How much energy makes how much mass ??

And how much mass makes how much energy ???

We're so happy you asked that.

Maybe you've heard that [ E = M c2 ] .

That's the answer to that one.

What does NAD energy stand for?

NAD stands for nicotinamide adenine dinucleotide, a coenzyme involved in cellular energy production. NAD is crucial for various metabolic reactions in the body, including converting nutrients into energy and supporting cellular functions.

Does Florida have prevailing winds?

South central Florida has always been a windy part of the state because it has the Gulf of Mexico to the west and the Pacific Ocean to the east. Areas near water are especially windy because of tides and currents.

What is the most nonrenewable resource?

The most nonrenewable resource is likely uranium used for nuclear power generation, as it is finite and takes millions of years to form. Once extracted and used, it cannot be replenished within a human lifetime.

Is natural gas exhaustible?

Yes, natural gas is considered a non-renewable resource because it takes millions of years to form. Therefore, it is exhaustible, meaning it can be depleted over time through extraction and consumption. However, the rate of extraction and discoveries of new reserves can influence how long natural gas will be available.

How induce charges are produced?

you are right charges can never be at rest but the columbs law and electric field and other topics are being studied just imaginary, suppose that when charges are at rest they must emit a field which is called as electric field.

Convex lens is thicker than?

Concave lens. Concave lenses are thinner in the middle and thicker at the edges, causing light rays to diverge. Convex lenses are thicker in the middle and thinner at the edges, causing light rays to converge.

What energy source would produce the most carbon dioxide?

Burning coal produces the most carbon dioxide compared to other energy sources due to its high carbon content. When coal is burned, it releases carbon dioxide and other greenhouse gases into the atmosphere, contributing to climate change.

What does inexhaustible resource mean?

An inexhaustible resource is a natural resource that is virtually unlimited in supply and cannot be depleted by human use. Examples include solar energy, wind energy, and tidal energy, which can be continuously replenished by natural processes.

Does methane on combustion produces carbon black?

no it means it was an incomplete combustion causing pure Carbon (carbon monoxide or sut).

How does lightning and thunder occur?

Lightning occurs when electrical charges build up in the atmosphere, creating a difference in charge between the ground and the clouds. When this difference becomes too large, it discharges as a bolt of lightning. Thunder is the sound produced by the rapid expansion and heating of air around a lightning bolt.