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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 has the highest energy and the shortest wavelength and can be used to scan metal?

X-rays have the highest energy and the shortest wavelength among electromagnetic waves commonly used for scanning metals. X-ray imaging techniques like X-ray fluorescence or X-ray diffraction can be used to analyze the composition or structure of metals.

How do heterotrophs extract energy from their food?

Heterotrophs extract energy from their food through the process of cellular respiration. This involves breaking down organic molecules such as glucose to produce ATP, the energy currency of cells. Through a series of biochemical reactions, energy is released and stored in ATP molecules for various cellular processes.

What is the SI unit symbol for heat energy?

Heat is a form of energy. In terms of kinetic theory it can be defined as

the sum of kinetic energy of molecules in a sample of a substance.

-- Its SI unit is the Joule.

-- Its CGS unit is the erg = 10-7 joule.

Comment

'Heat' is energy in transit between a warmer body and a cooler body. The definition given in the original answer is for 'internal energy', not heat.

Energy flow in an ecosystem is not cyclic because energy is?

lost as heat through metabolism and cannot be recycled back into the system.

If you drink glucose powder dissolved in a glass of water you will get instant energy can you tell why?

when we eat food it is finally converted into the most basic form i.e. glucose so when we drink glucose directly it is directly absorbed by the cells without processing in the stomach so it gives instant energy

Can kinetic energy be measured in newtons?

No, kinetic energy is measured in Joules (J), as this is the SI unit for energy.

A device that uses an outside energy source to transfer thermal energy from a cool area to a warm area is called a?

A device that transfers thermal energy from a cool region to a warm region is called a Heat Pump. Refrigerators are an example of this. So are many air conditioning units.

When potential energy turns into electrical energy which form of energy does potential first become?

Potential energy becomes static energy in the form of a difference of potential energy between two bodies, or clouds of charged particles. For instance the motion of any object against another object causes particles to become statically charged. That is potential and electrical. Once an electrical path is found between those fields the electrical force becomes similar to kinetic force and this is current.

A pear is 3.5 m above the ground and has a mass of 0.14 kg what is the pear's gravitational potential energy?

The potential energy of the pear can be calculated using the formula: PE = mgh, where m is the mass (0.14 kg), g is the acceleration due to gravity (9.81 m/s^2), and h is the height (3.5 m). Plugging in these values, we get PE = 0.14 kg * 9.81 m/s^2 * 3.5 m = 4.857 J.

What is the thermal energy of system?

The total kinetic energy within a system

What is the potential energy of a 40 N object 10 meters above its reference point?

The potential energy of the object is 400 J. Potential energy is calculated as the product of the object's weight (40 N) and its height above the reference point (10 m). The formula for potential energy is PE = mgh, where m is the mass of the object, g is the acceleration due to gravity (approximately 9.8 m/s^2), and h is the height.

What is the potential energy of a 500 N weight before it falls 10 m?

500 n is a force created by a mass (500 / 9.807) = 50.98 kg

so: potential energy = m * g * h = 50.98 * 9.807 * 10 = 5000 joules.

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if it was 500 kg (not newtons) weight, then m*g*h = 500 * 9.807 * 10 = 49035 joules.

What is Gravitational Kinetic energy?

There is no such thing as "gravitational kinetic energy". Kinetic energy is energy contained in movement, and it doesn't make any difference, for the energy contents, whether an object was accelerated by gravity or by any other means. All you need to know is the object's speed and mass. "Gravitational energy" basically refers to the potential energy which an object has as a result of the gravitational field.

Answer2:

Gravitational "kinetic" energy is mv2 equal to mGM/r the potential energy or scalar energy. This gives v2 = GM/r, and the orbit frequency w2 = GM/r3.

Gravitational Energy also has vector energy cP= cmV, creating a Quaternion Energy. cP is the so-called "Dark Energy":

Total Energy E = -mGM/r + cP = [-mu/r, mcV]

The force is the first derivative:

F = [d/dr, Del] m[-u/r, cV] = m[u/r2 - cDel.V, cdV/dr -Del u/r + cDelxV]

F = mcv/r[v/c - cos(V), -1V + v/c 1R + sin(V) 1H]

Conservation of Gravitational Energy occurs at v/c= cos(V) = 1 and V is parallel to R. v/c = cos(V) is the redshift, v/c is the Gravitational Fine Structure Constant.

Can you save energy by using tube lights?

Whether you'll save energy depends on how you will use the lighting. Tube lights tend to draw a high current when they "start up". If you intend on leaving them on for long periods of time then yes, you will probably save energy. But if you use them to turn them on and off a lot in a short period of time I would say no. That's the reason why a lot of big office buildings in big cities like New York never turn off their tube lighting at night.

Describe importance of the location of Muslim countries?

Muslim countries are spread over a wide area in the world; from North Africa to Middle East to the subcontinent of India to the specfic area and FAr East.

they have tremendous resouces of oil, natural gas, phosfates, minerals, and other resources.

Does a steep line have a negative slope?

Yes, a steep line typically has a negative slope. The slope of a line represents the rate at which the line is increasing or decreasing. In the case of a steep line that is sloping downwards from left to right, the slope is considered negative.

Why is the son known to be the source of energy for all organisms on earth?

The sun is the main source of energy on earth simply because of food webs/chains and trophic levels. At the bottom of every food chain there is a primary producer, and these producers are almost always photosynthetic--meaning that they use light energy to synthesize sugars and other organic compounds. The next level on the food chain are the primary consumers (those that eat the primary producers), from there secondary consumers, tertiary consumers, quaternary consumers, etc. The important thing to remember though is that all energy comes from the primary consumers, the photosynthetic organisms. For an example: if you think of the primary producers as grass, than the primary consumers would be field crickets. The crickets eat the grass, the mice eat the crickets, the snake eats the mice the hawk eats the snake. But because every organism above the primary producer needs to obtain energy to survive that means that all the organisms rely on the primary producer; which itself relies on the sun for energy.

How does an electric kettle know to switch off when the water is boiling?

First, a 'Bi-metallic Strip' consisting of two different metals, having different 'Coefficients of Expansion', fused together in a two-layer strip which is connected electrically to the kettle element power supply.

It is placed in a chamber, generally in the kettle handle, where steam from the top of the kettle can come into contact with the chamber holding the metal strip. (Not with the strip itself).

When at room temp., the electrical contacts are closed allowing current to flow to the Element when power is switched on.

When the kettle boils, steam is passed around the chamber that contains the strip, causing it to heat up.

The metal having the higher 'C of E' of the two making up the bi-metal strip, will expand more than the other, causing the strip to bend and open the contacts, thus shutting off the power.

What are the ultimate sources of ocean thermal energy?

  • Actually ocean thermal energy is being used in all the cold and icy places called Alaska and Antarctica because Ocean thermal is the difference between cold and warm waters. so that is important because when the water is warm it will melt and causes global warming.And the earth will be a flooded area and that is really dangerous.

Is heat from magma used to heat water and produce steam for powering electric generators?

Yes, geothermal energy from magma is utilized to heat water and produce steam which drives turbines connected to electric generators, creating renewable electricity. This process often occurs in geothermal power plants situated near volcanic regions or geologically active areas.

When thermal energy moves out of a substance the temptarue will?

The temperature of the substance will decrease.

Scientists refer to the entire process and its effects as "cooling". But my dick is hotter. >:)

What do all of the different forms of electromagnetic radiation together make up?

All forms of electromagnetic radiation make up the electromagnetic spectrum. This includes visible light, radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays. Each type of radiation has a different wavelength and energy level.

Does an electric can opener convert electric energy sound energy?

Not likely - any machine wastes some energy; that would reduce the useful output energy.

What is the activation energy of a reaction apex?

The activation energy of a reaction is the minimum amount of energy required for a reaction to occur. It represents the energy barrier that must be overcome for the reaction to proceed. The value of activation energy varies depending on the specific reaction.

What is the chemical essential for plants to capture light energy?

Chlorophyll is the pigment essential for plants to capture light energy during photosynthesis. It absorbs sunlight and converts it into chemical energy that the plant can use to fuel its growth and development.