Norms Green Energy

Posts Tagged ‘Conservation Of Energy’

How do step up transformers obey the law of conservation of energy?

For an ideal transformer:

V * A on the primary side = V * A on the secondary side.

V * A is power, which is the rate at which energy is delivered. If the rate of energy is the same on the primary and secondary, then energy is conserved.

In order for V * A to be the same on the secondary as it is on the primary and, if it is a step-up transformer, then
n * Vprimary = Vsecondary
hence, 1/n * Aprimary = Asecondary

(n * V) * (1/n * A) = n/n * V * A = V * A energy is conserved!

.

Technorati Tags: Conservation Energy, Conservation Of Energy, Ideal, Law Of Conservation, Law Of Conservation Of Energy, Step Up Transformer, Step Up Transformers

In conservation of energy, for example throwing a ball up and catching it, how does air resistance (non free fall) impact the conservation of energy? Is it because energy is lost due to work done on the air?

"What is the effect of air resistance on the conservation of energy?"
It doesn’t change the idea of conservation of energy, but it makes calculations using it more difficult.

"Is it because energy is lost due to work done on the air?"
Yes. Air resistance creates lower final energy values than we calculate if we neglect it.
So the ball wouldn’t go as high or fall back as fast as you would predict if you neglected air resistance.

Without air resistance conservation of energy tells us that:

mv^2/2 = mgh

where v is the velocity at which the ball left your hand and h is the maximum height. The mass m cancels and we can write:

v^2/2 = gh, so h = v^2/2g

If we consider air resistance we have to write:

mv^2/2 = mgh + A

Where A is the energy lost to air resistance.

Notice that mass no longer cancels. We can solve for h :
v^2/2g – A/mg = h

this is less than
v^2/2g

Technorati Tags: 2g, Air Resistance, Conservation Of Energy, energy conservation, Energy Values, Free Energy, Gh, Lost, Maximum Height, Mv, Quot, velocity, Yes Air

law of conservation of energy says that "energy cann’t be created nor destroyed however it can be changed from one form into another"
while quantum theory says that "something can be made from nothing"
is quantum theory contradicting the law of conservation of energy?

The law of conservation of energy, has no relevance. The question should be how efficient is the fuel system. Most fuel systems are at best about 15% effluent. In 1936 Charles Pogue, patented a carburetor that got 26.2 miles to the pint. 209.6 MPG. That carburetor, was calculated to be 72% efficient. Now laws are being violated, except the laws of efficiency. Lead and other additives were not added to gasoline until after 1936. This was done to gum up Pogue’s carb. Just as today if you look into a carburetor, you can see varnish left over from the additives. It is good business if you car does not get good mileage, the oil company makes more money. If your car’s engine does not last as long because of additives, the car industry makes more profits. A win/win situation. At least for the oil and car companies. In 1936 when Pogue’s carburetor was announced, many people at the Winnipeg Exchange sold oil stocks. Oil stocks lost value overnight. Just some thoughts and observations

Technorati Tags: Additives, Car Companies, Car Industry, Carburetor, Charles Pogue, Conservation Of Energy, Effluent, Fuel System, Fuel Systems, Gasoline, Good Business, Good Mileage, Law Of Conservation, Law Of Conservation Of Energy, Oil Company, Oil Stocks, Pint, Quantum Theory, Varnish, Winnipeg

In Physics, Interference of light is in accordance with the principle of conservation of energy. But, in some text i found that diffraction doesn’t obey, even though both are wave phenomenon. If it is so, what is the reason behind it.

In general, a lot of care must be taken when working with the energy of wave phenomena. It is very difficult to localize energy within distances less than one wavelength.

In diffraction, light is interacting with matter, so some will be absorbed by that matter and be converted into heat. Furthermore, the matter will re-radiate, so it is actaully a subtle thing to determine where the energy goes. In fact, technically speaking, it is the re-radiation by the matter that creates the diffraction pattern by cancelling the portion of the wave that would have gone through the matter.

In any case, the energy discrepancy will show up as heat in the matter.

Technorati Tags: Conservation Of Energy, Diffraction Of Light, Diffraction Pattern, Discrepancy, Distances, Interference Of Light, Light Energy, Lot, Physics Light, Principle Of Conservation, Principle Of Conservation Of Energy, radiation, Wave Phenomena, Wave Phenomenon, Wavelength

Suppose that N sticky balls having masses m1, m2, m3, … , mN are arranged about a point in space with various distances and in various directions. The balls are all moving toward the point such that they will all arrive at the same moment. Since they are sticky balls, they will not rebound, but will adhere to each other in a lumpy cluster.

The amount of a particle’s momentum is proportional to the speed to the first power, but the amount of a particle’s kinetic energy is proportional to the speed squared.

Is it possible that the law of the conservation of momentum will require that the aggregate mass, after the collision of all the sticky balls, move in one direction, while the law of the conservation of energy will require it to move in a different direction?

No. Momentum is always conserved in a closed system, while conservation of energy does not require kinetic energy to be conserved in an inelastic collision; it can be converted into other forms. There is no conflict between the two.

Technorati Tags: Balls, Conflict, Conservation Of Energy, Conservation Of Momentum, Direction, Directions, Distances, Inelastic Collision, Kinetic Energy, Law Of The Conservation Of Energy, M2, Moving, Particle