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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 usefull and wasted energy in a hair dryer?

The useful energy in a hair dryer is the electrical energy that is converted into heat energy to dry and style hair. The wasted energy in a hair dryer is the energy lost to friction and air resistance, as well as any energy that is not effectively transferred to the hair. This wasted energy may manifest as noise, heat loss to the surrounding environment, or inefficiencies in the motor and heating elements.

What is the energy transformation in a campfire?

In a campfire, the energy transformation begins with the chemical potential energy stored in the wood. This energy is converted into thermal energy through the process of combustion, as the wood reacts with oxygen to release heat and light. The thermal energy produced warms the surrounding air and objects, providing heat for cooking or warmth.

How does energy transfer through electric power grid?

The electric power grid transfers energy in three main steps. First, power plants generate electricity using sources like coal, gas, or renewables. This electricity moves through high-voltage transmission lines, which efficiently carry power over long distances. Once near cities and towns, transformers reduce the voltage for safe distribution. Finally, lower-voltage lines deliver electricity to homes and businesses, ensuring reliable power for everyday use. The grid constantly adjusts to balance supply and demand, preventing overloads and blackouts.

The total energy of an object is called?

Kinetic Energy is equal to 1/2mv^2.

Potential Energy is equal to mgh.

To get the total potential and kinetic energy of an object, you do the following:

1/2mv^2+mgh = Total Energy.

m represents mass in kg

v represents velocity in m/s

g represents gravity, a constant of 9.8 m/s^2

h represents height from ground in m

How is sun energy transferred to you if you eat burger and chips?

The potato plant uses energy from the sun in order to grow. The cow eats grass - which has used energy from the sun to grow.

What is the name for very old decayed plant material burned as fuel?

Oh, dude, that's easy. We call that stuff "fossil fuels." You know, like coal, oil, and gas. They're like the ancient leftovers of plants and animals that we just burn for energy. It's like nature's way of saying, "Here, have some ancient leftovers, enjoy!"

Advantages and disadvantages of radiant energy?

Radiant energy, also known as electromagnetic radiation, has several advantages including its ability to travel through a vacuum, such as space, and its high speed. It is also versatile, with a wide range of applications in technologies like solar panels and communication systems. However, a major disadvantage is that some forms of radiant energy, such as ultraviolet and X-rays, can be harmful to living organisms if not properly controlled or shielded against. Additionally, the intensity of radiant energy can vary greatly, leading to challenges in harnessing it efficiently for practical use.

What is wasted energy in a toaster?

Oh, dude, wasted energy in a toaster is like when you put in a single slice of bread and the toaster is all like, "I gotta heat up all these coils just for one slice?!" It's basically when the toaster uses more energy than necessary to toast your bread because you didn't fill it up. So, like, next time, just pop in a couple more slices and save some energy, man.

How much sunlight does the deciduous forest get a year?

The coniferous forest receives a lot of sunlight each year. Combined with the high rainfall amounts, plants find it the perfect climate in which to thrive. In some areas, the forest can have as much as 18 hours of sunlight per day.

What kind of energy does a stove use?

If it is a gas stove it will use kinetic energy from a chemical reaction, adding it as potential energy (molecular motion) to the molecules of whatever is heated. In an electric stove, electrical energy becomes radiant thermal energy, some of which becomes potential energy in whatever is heated.

What type of energy causes cement to dry?

The type of energy that causes cement to dry is chemical energy. When water is added to cement, a chemical reaction called hydration occurs, where the water molecules react with the cement particles to form new compounds. This reaction releases energy in the form of heat, which helps to drive the hardening and drying process of the cement. The hydration process is essential for the formation of strong and durable concrete structures.

How many homes can a megawatt power?

It is the amount of power available that determines how many homes can be supplied. And the answer is complicated, because it is necessary to take what is termed the 'after diversity, maximum demand' (ADMD) of the potential load in order to determine how many homes can be supplied. ADMD takes into account that no single property operates at maximum load on a permanent basis, and when one home owner is at home, several others are at work, etc., so the more properties there are, the lower the actual load will be compared with the theoretical maximum load.

In the very simplest case, with a large number of properties, a figure of just 3 kW per property might be appropriate but, where heavy permanent loads, such as electric heating or air conditioning are used, determining the ADMD is far more complicated because these permanent loads must be taken into account.

As already explained, ADMD assumes that not all properties are utlilising their maximum demand at the same time, so an ADMD might appear to be surprisingly low. So, as an example, let's assume an ADMD of, say, 5 kW, would mean that one megawatt could supply 200 properties.

ADMD figures are important, because they help designers determine what size transformers are needed to supply new developments. The actual load can them be monitored using thermal demand indicators attached to the transformer's secondary conductors and, in practise, these usually indicate that the theoretical ADMD figures, as low as they seem, are surprisingly generous.

Another Answer

An average U.S. household uses about 10,000 kilowatt-hours (kWh) of electricity each year. A watt is a unit of power, or energy per unit time, so it's the rate at which energy is being used. A kilowatt-hour (or 1000 watt-hours) is a unit of energy, so 10,000 kWh is how much total energy each household uses over the course of a year.

This means that each household, on average, uses energy at a rate of about 1 kilowatt (1000 watts, which equal to ten 100-watt light bulbs).

One megawatt is equal to one million watts, so for one instant, one megawatt can power 1000 homes.

A better question to ask is how many homes can a megawatt-hour (MWh) provide with energy for one hour? If one home needs 1 kWh of energy for one hour, then 1 MWh of energy can sustain 1000 homes for one hour.

What form of energy is in a church bell?

The form of energy in a church bell is primarily mechanical energy. When the bell is struck or rung, potential energy is converted into kinetic energy, causing the bell to vibrate and produce sound waves. This mechanical energy is then transferred to the surrounding air as sound energy, creating the ringing sound that we hear.

How much work can be done with 10 joules of energy?

Oh, dude, with 10 joules of energy, you can do 10 joules of work. It's like a one-to-one energy to work exchange, pretty straightforward stuff. So yeah, not a whole lot of work, but hey, at least you're getting something done, right?

What are some ways people can get energy besides eating food?

People can get energy through various means besides eating food. One common way is through the process of cellular respiration, where the body converts nutrients into energy. Additionally, energy can be obtained through sunlight via the process of photosynthesis in plants. Other sources of energy include chemical reactions, such as those found in batteries, and mechanical energy from activities like exercise.

How nuclear energy transformed to thermal energy?

Nuclear energy is transformed into thermal energy through a process called nuclear fission, where the nucleus of an atom is split into smaller nuclei, releasing a large amount of energy in the form of heat. This heat is then used to produce steam, which drives turbines connected to generators, ultimately producing electricity. The efficiency of this transformation is high, as nuclear fission releases millions of times more energy per unit mass than traditional fossil fuels.

What is the force that pushes electricity or a current In most homes this force is 110 volts?

Oh, dude, that force you're talking about is voltage. It's like the push that gets electricity flowing in your home. And yeah, in most homes, that push is around 110 volts. So, next time you plug in your toaster, just remember it's all about that voltage making things happen.

One reason why people should be aware of the impact of their actions on the environment is that?

because we only have one planet, sweetie, and it's not like Amazon Prime can deliver a new one in two days. So, if we keep trashing this place like a frat house after a kegger, we're all screwed. Plus, who wants to live in a world where the only wildlife left are cockroaches and pigeons?

What energy does a television produce?

Light and sound as well as heat, which is a waste product.

What are 3 energy transformations for a piano?

Well when you hit the key, it triggers the hammer to hit the string , so that would be mechanical . Then , it hits the string that creates a vibrational wave , then , of course, it creates a sound wave . That's all I got .

Compare and contrast radiant energy and sound energy?

Radiant energy is a form of energy that travels in waves and can move through a vacuum. It includes electromagnetic radiation such as light, radio waves, and X-rays. Sound energy, on the other hand, is a form of mechanical energy that requires a medium, such as air or water, to travel through. It propagates through compressional waves, where particles of the medium oscillate back and forth. In summary, radiant energy is electromagnetic in nature and can travel through a vacuum, while sound energy is mechanical and requires a medium for propagation.

What is the size of a natural gas orifice for 50000 Btu?

Oh, dude, the size of a natural gas orifice for 50,000 Btu is typically around 0.052 inches. But hey, who's measuring, right? Just make sure it's not too big or too small, like finding the Goldilocks of orifices.

How can you generate electricity using magnets?

Any time a magnet's flux lines cut past a conductor (wire), a small pulse of electricity is generated. A generator is the same as a motor, except, it's rotor core is rotated by external means (wind, waterfall from a dam, steam and so on). As the rotor rotates, the magnetic field lines cut the conductors creating a pulse of electricity. The faster the rotor is rotated, the more power you will generate. You can experiment by using a small toy motor, connect the wires to a small low voltage light bulb, then rotate the rotor; the light bulb will light up.