# 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 wit…h 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!

# 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, = 6.62…6068 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 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.

# 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

# 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 proportiona…l 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?

# Which gland determines the rate at which the human body uses energy?

The anterior pituitary gland.

Answered

In Chemistry

# What is the formula used to determine the total number of possible electrons in each energy level?

2n squared

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# 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)

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In Physics

# 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.

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In Uncategorized

# What term is used to describe the main source of energy used to determine the weather on earth?

The Sun

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In Physics

# 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)