# How is energy use determined?

# What laboratory methods are used to determine the energy content of foods?

calorimeter .
although not most accuratethe simplest way to test the energy content of foods is using a calorimeter, this is basically a insulated copper beaker filled with water. the item of food is burned under the copper cup. the change in temperature of the water is then taken. using the specific heat of water and copper it is possible to find how many joules of energy were added to the water and beaker. this value can then be converted into calories if desired

# How did Niels Bohr use spectra to determine energy levels of atoms and ions?

\n.
\n Patterns in Spectral Lines \n.
\nWhen a gas is excited in an electrical discharge, light is emitted (this is essentially how neon lamps work). Niels Bohr looked at this emitted light using a spectrograph, which separates different wavelengths of light (just a like a simple triangular prism). Atoms, such as hydrogen or neon, emit very specific patterns of light. When you separate the wavelengths, you see a pattern of very sharp lines of light at only certain wavelengths and not others. In other words, the atoms emit only certain wavelengths of light, resulting in a series of lines when you look at the light through a spectrograph. Bohr looked at these lines and managed to figure out the pattern that determined which wavelengths were observed. He said that the light emitted was due to transitions between energy levels in the atoms, and the wavelength of light corresponded to the energy difference between the two states involved in the transition. In this way, he figured out the equation to predict the spacing between all of the energy levels of any one-electron atom or ion.\n.
\nHis model was quite successful, and he was able to predict which lines you would see for things that hadn't even been measured yet (a good test for any theory!). Surprisingly, although he figured out the pattern so well, he didn't actually know what the patterns were really due to. In fact, he had to make assumptions that turned out to be completely false! However, despite these errors (which were corrected when quantum mechanics was developed), the Bohr model of the atom is very useful for many applications. His model does NOT work well for multi-electron atoms/ions, which unfortunately includes the large majority of atoms and ions! You need quantum mechanics for that!

# The kinetic energy of a substance is determined by what?

The kinetic energy of anything is determined by the mass and velocity of the substance. This is represented in the equation: KE=(1/2)mv 2

# How does solar energy determine weather and climate?

if there was no solar energy then there would be no winds because the sun heats the ground and all the air around it and it rises and it pushes cold air down to the ground and the hot air cools off and the cold air warms up and that process of heating creates winds.

# What is the equation used to determine the energy content of a packet of light of specific frequency?

Planck's Equation, E = hv Where E is the energy contained within the photon of light, h is Plank's constant, and v is the frequency of the light. Planck's constant, h, = 6.626068 X 10 ^ -34 J s and frequency of light = speed of light / wavelength this is not only used in light but also to find energy of all electromagnetic radiation

# What is the formula you use to determine the gravitational potential energy of an object?

Weight x Height = Potential energy The units and the calculation are the same as for work. Work is force through a distance. Get the weight in the SI by multiplying the mass in kilograms by the acceleration due to gravity on earth like so: 1.00 Kg x 9.81 m/s 2 = 9.81 Newton .
The gravitational potential energy of a 1.00 Kg mass lifted 1.00 meter on earth will be: 1.00 Kg x 9.81 m/s 2 x 1.00 m = 9.81 J .
In the SI, you will give the answer in Newton meters or Joules.

# What determines the energy of a river?

I think it's a correlation of the volume of water multiplied by the steepness of descent. That is Mass X Velocity. Having said that please note I did start with the words 'I think....'

# How do you determine an energy coefficient?

Hydraulic energy coefficient is: EnD=E/(n*D)2 where EnD is theenergy coefficient E is the specific hydraulic energy (J/kg) n isthe rotational speed (rpm) D is the diameter (m).

# What is the formula you use to determine the gravitional potential energy of a object?

The gravitational potential energy of an object is given by: Ug=mgy M is the mass, g is the gravitational constant, and y is the height of the object.

# How do you determine ionization energy?

they should giveyou a chart to read off.... if they don't, then the first is small, and then it increases as you take more electrons... because the atomic radius is decreasing, the nuclear pull is increasing, and the ratio of protons to electrons is increasing, so the electrons are pulled in more tightly

# How can you determine an objects mechanical energy?

You have to use a method of absorbing the energy, and measuring what has been absorbed. For example engines are tested using a dynamometer, which can measure the force exerted and the rate of working of the engine. A simple analogy would be with the fairground game where you slam a hammer down onto some sort of pivot which raises a weight, the height it goes to indicates the energy put into the blow. So its a matter of making such a test more accurate and scientific.

# How is the energy value of foods determined?

It is determined by the number of calories. 1000 Calories equals one kilocalorie and a daily in take is 2, 500 Calories.

# How is the energy value of food determined?

it determines how your weight equals the mass of the height of what you and your attracting bodies weight and eat... ( im an scientist who knows everything about these stuff... Thank you )...

# How to Determine elastic potential energy?

The potential energy is the product of the force required to compress or stretch the elastic medium, and the distance of travel. If the force is measured in Newtons and the movement in meters, the work done will be in Joules.

# What determines an objects thermal energy?

What determines an objects temperature. The higher the temperaturethe faster the particles move, the more Kinetic Energy they haveand the greater the objects Thermal energy=) Haha I am superr dupper dumb

# What determines potential energy of an object?

it exist whenevet an object which has mass has a position within a force field

# What determines an energy level?

The energy of a photon is described by the equation: Where l is the wavelength, h is Planck's constant, c is the speed of light, and E is the energy. So, the energy of a photon increases as the wavelength decreases.

# To determine energy band gap of a semiconductor using four probe method?

Probes connect the metal and semi conductors so that we can allow the flow of current as germanium could not produce current.Probe provides a physical contact with germanium.

# What formula do you use to determine the amount of energy used by an appliance?

The total amount of energy used by an appliance is equal to the power consumption multiplied by the time the appliance is in use. E = P x T ENERGY=POWERxTIME DDASIA

# What is formula you use to determine the gravitational potential energy of an object?

PE = mgh, that is, mass x gravitation x height. Or simply weight times height, since weight is already equal to mass times gravitation.\n\n.
On Earth, you would usually use 9.8 (meters per second square) for gravitation.\n\n.
If mass is in kg., gravitation in meters per second square, and height in meters, then the result will be in Joule.\n

# An object's kinetic energy is determined by what?

KE = 1/2mV 2 The mass of the object times the velocity of the object squared and a 1/2 constant derived from a calculus derivation of a kinematic equation.

# Why a Gm counter is not useful for determining absorbed energy in a gas?

The Geiger-Meuller detector operates in avalanche mode, meaning that each ionization interaction results in a full pulse on the detector. Each pulse, then, is not proportional to the energy of the original event, making this not useful for determining absorbed energy. If you want to do that, you need to operate in linear mode. Its not just a case of reducing the operating voltage, as material, gas, and geometry are a factor in deciding which end result is more important.

# What factors determine whether a source of energy is useful?

1 Whether it is a renewable resource, (a resource that naturally renews itself, like solar power or wind) 2 Its cost effectiveness (does it help reduce the cost of energy in a community) 3 How easy it is to harness this source of energy 4. Whether or not using this resource is harmful to the environment (sometimes wind turbines kill wildlife and scare cows lol) 5 If people want a wind farm in their community or not (if the people aren't for it, it won't be used) 6. Is there a need for said source of energy 7 What types of gases/waste does it produce into the air/water supply when it's being used? Does it harm the environment, or does it simply vaporize? 8 Does it biodegrade safely in dumps, compost heaps, or landfills?

# Does amplitude determine the energy of a wave?

Yes. Basically, the energy is proportional to the square of the amplitude. Yes. Basically, the energy is proportional to the square of the amplitude. Yes. Basically, the energy is proportional to the square of the amplitude. Yes. Basically, the energy is proportional to the square of the amplitude.

# What characteristic determines the energy of a light wave?

It's wavelength or frequency. The energy of a light photon (particle of light) is equal to (h x c) / wavelength, or to h x frequency, where h is Planck's constant and c is the velocity of light in a vacuum.

# How is gravitational potential energy determined?

Potential Energy is calculated by the product of the mass of the object ( not weight! ), the gravitational acceleration ( 9.81 m/s/s ) and the height of the object above a datum. mass x 9.81 x height

# How does an infrastructure determine your access to types of energy?

if a fart eats another fart then the fart will mix with dookie an make a shart

# Determine how energy is related to change in state?

Energy is used to do work against in separating the mutually attracive atoms or molecules from each other to change them from solid into liquid and from liquid into gaseous state.

# In experiment to determine the energy band gap of ge crystal using four probe method why it is called four probe method?

Coz in this expermnt oven containing four probes is used to maintain the continuity with crystal

# What is the mathematical formula used to determine the amount of energy required to melt one gram of ice?

The mathematical equation is E=MC^2. However, it'll only work if your substance is dihydrogen monoxide. Now that you know the answer, go solve it.

# What two factors does the electric company use to determine how much a business will pay for electrical energy?

There are more than two factors, however, the main two factors are kilowatt hours of energy used and weather the energy is used in peak or off-peak times. Other factors like power factor correction and maintenance of on-site transformers and power conditioning equipment for large businesses can affect how much a business pays for electricity.

# How do the wavelength and the frequency of a wave determine its energy?

There are two kinds of waves. One is mechanical for which the energy is given by the expression 2 m pi 2 a 2 nu 2 . a is the amplitude of vibration and nu is the frequency of vibration. Hence in case of mechanical waves, energy is proportional to the square of the amplitude. But in case of electromagnetic wave photon concept is introduced as quantum of energy. The energy of thee quantum is given by the expression h nu. Here h is Planck's constant and nu the frequency of radiation. Hence the energy content of each photon is proportional to the frequency of radiation. But the intensity of radiation is computed by the number of photons per second.

# How does activation energy determine if a reaction will release or absorb energy?

Activation energy is really just the minimum amount of energy needed for a chemical reaction to occur. Without it, the energy will stay the same and the substance cannot undergo a chemical change. The thing to look at, I think, is the product of the reaction. For example, in a graph, two substances could have the same activation energy, but after the reaction the amount of energy in substance 1 could be extremely low and the amount of energy in substance 2 could be higher than the activation energy. In substance 1, evidence of an EXOTHERMIC reaction has occurred because the amount of energy in the original substance was lost indicating that it has released energy. Whereas in substance 2, when the amount of energy was higher than the activation energy, it is evident that an ENDOTHERMIC reaction has occurred because the amount of energy after the reaction is higher than it was before the reaction. This shows that substance 2 absorbed energy making it endothermic. hope this helps!

# What is the formula used to determine the gravitational potenital energy of an object?

PE = mgh Potential energy = mass x gravity x height In SI units: Joules = kilograms x meters/second 2 x meters Standard Earth gravity is about 9.8 meters/second 2 .

# What determines an ecosystems energy budget?

Ecosystem energy budget`s depend primarily of autotroph`s such as photoautotrophic organisms. The budget (energy that can be used by energy flux) depends on these primary producers for the rest of the food webs.

# What determines electomagnetic wave energy?

The energy of a photon is the frequency times Planck's constant, hÎ½ . Gamma ray photons have the highest energy, then x-rays, ultraviolet, visible light (from violet to red), infrared, microwaves & radio waves. Then there's intensity whuch depends on how many photons you have. The brighter the light the more energy you get per unit time per unit area.

# How do you determine how many energy levels an atom has?

To determine the no. of energy levels present in an atom, it's proper electronic configuration must be written. The highest principle quantum number tells that the atom consists of that much shells including all the sub-shells and the orbitals. Example:- Elec. config. of oxygen is 1s 2 2s 2 2p 4 . It shows that highest principle quantum number is 2 which means it has 2 energy levels.

# What formula do you use to determine the Gravitational potential energy of an object?

Gravitational potential energy = (weight of the object) x (height) or Potential energy = (mass) x (acceleration of gravity) x (height)

# What determines kinetic energy of gases?

Heat and pressure. the more pressure we put on a gaseous substance the greater the heat. the greater the heat the more kinetic energy it has.

# How can you determine if your appliances are energy efficient?

The "Energy Star" logo is an easy way to see if an appliance is energy efficient. You should also read the instruction manual, and know your product well enough to observe that it is working properly.

# What determines the rate of energy delivered by current?

The rate at which energy is delivered by an electric current is equal to (Magnitude of the current) 2 multiplied by (total resistance through which the current flows)

# How do you determine frequency and energy in a wave?

To determine frequency, you can use the formula f = 1 / T, where T is the period of the wave. Period refers to the time taken for one complete wave cycle or a complete wavelength. Energy can be calculated by the sum of potential energy and kinetic energy at any point, since the total energy remains constant, assuming that there is no damping.

# What do nutritionists use to determine how much energy you get from food?

they look at how many poopie fibers are in it then they add their own and feed it to your moms vagina.

# How is the thermal energy of an object determined?

Just using H = m x s x @ m= mass of the object in kg s= specific heat capacity in J/kg/K @ temperature in K So H will be in J

# How can the activation energy of a reaction be determined experimentally?

To ascertain activation energies experimentally you must measurethe reaction rate k on the basis of varying temperatures T, youshould plot the logarithm of k against 1/ T on a graph.

# How can the number of electrons in the outer main energy level of phosphorous be determined using the successive ionization energies?

As each electron is removed, the successive ionization energy values increase. However, the ionization energy increases a lot when the sixth electron is removed. This suggests that the sixth electron is removed from a shell which is closer to the nucleus..

# How is energy efficiency determined?

You divide useful output energy by the input energy. Or equivalently, useful output power by input power.

# How do you determine the amount of electrical energy used by a device?

Measure the current flowing through the device and the voltage across it; multiply the current by the voltage to get the power in Watts. Watts = Volts x Amps ; Watts = Amps 2 x Resistance (steady state answers using friendly units)

# How can you determined how much kinetic energy an object has?

If you know the mass and velocity you can calculate it from theformula K.E. = Â½mÂ·VÂ² where K.E. is the kinetic energy, m is the mass, and V is thevelocity.

# What determines the loudness or energy of sound?

The source of the sound determines how loud it is. Sound is apressure wave transmitted through a material medium the energybeing released at the point of origin of the sound determines theenergy in that pressure wave and the more the energy the louder thesound.