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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 primary energy source for a long distance runner?
The primary energy source for a long distance runner is carbohydrates, stored as glycogen in the muscles and liver. As the runner exercises, the body breaks down the glycogen into glucose to provide energy for the muscles. In longer races like marathons, the body may also start using stored fat as an energy source.
The substance formed during catabolism is adenosine triphosphate (ATP). ATP serves as a primary carrier of chemical energy within cells and is utilized for various cellular processes, providing energy for metabolic reactions.
Energy transformation when dropping a yoyo?
Potential - Kinetic - Potiential again
as you drop the yo yo, the potential energy it had at its height is converted to kinetic energy. as it starts to come back up, it is converted back to potential energy
Electricity is not a clean source of energy?
it depends on if you are talking about CO2 pollution or others. coal is the number one pollutant of Co2 although current hydrogen power is just about as dirty as whatever is used to separate hydrogen from oxyen atoms.
The higher the wattage, the more electrical energy is being used. In a light bulb the electrical energy is converted to EM energy which appears in both visible and infrared parts of the spectrum, so the answer is no, it will be at a higher rate for a 100 watt bulb
What happens to a substance as its thermal energy increases?
As thermal energy increases, the substance's particles move faster, leading to an increase in temperature. Eventually, the substance may undergo a phase change (e.g., melting or boiling) or undergo chemical reactions if the increase in energy is significant enough.
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.
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 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.
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 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.
