Sentences with phrase «energy per unit»

Before the light (radiation) from star A has time to propagate to star B (and vice versa), isn't it reasonable to say that star A is radiating a quantifiable amount of energy per unit time in the direction of star B, and vice versa?

I believe that if in the vacuum of space you place a blackbody object with (a) a constant (i.e., unchanging energy per unit time) internal thermal energy source, and (b) internal / surface thermal conduction properties such that independent of how energy enters the blackbody, the surface temperature of the blackbody is everywhere the same and you place that object in cold space (no background thermal radiation of any kind), eventually the object will come to a steady state condition — i.e., the object will eventually radiate energy to space at a rate equal to the rate of energy produced by the internal energy source.

The spectral distribution is characterized by specifying as a function of frequency the amount of radiated energy per unit frequency.

Another way to think of this reduction is to realize that half of Earth's surface (the night side) is in the dark and thus receiving no solar energy at a given moment, while areas near the edges of the planet (near the poles and around dusk and dawn) are receiving reduced amounts of energy per unit area.»

You quote: (your bold) «< Another way to think of this reduction is to realize that half of Earth's surface (the night side) is in the dark and thus receiving no solar energy at a given moment, while areas near the edges of the planet (near the poles and around dusk and dawn) are receiving reduced amounts of energy per unit area.

Thin - film solar modules are cheaper than crystalline modules and produce more energy per unit of installed capacity.

A mix of options to lower the energy per unit of GDP and carbon intensity of energy systems (as well as lowering the energy intensity of end uses) will be needed to achieve a truly sustainable energy future in a decarbonized world.

TSI defined: «Solar energy per unit time over a unit area perpendicular to the Sun's rays at the top of Earth's atmosphere.»

If the surface temperature of the sun is 5800 K and if we assume that the sun can be regarded as a black body the radiation energy per unit area can be expressed by modifying (1) to

Moreover, anything that slows down the rate at which the Earth radiates to space requires that the Earth heat up so as to be able to shed the same amount of energy per unit time and increasing greenhouse gas concentrations does that.

This motion creates potential energy per unit mass (PE) that can be released by flows pre-existing inside the star.»

(Grand Canyon) Low Head Hydroelectrical Generators Low head: Propellor type Turbines Power = Change in Potential Energy per Unit time = weight * Vertical drop / time Energy = Power * time Microhydro Installation Small stream with Hydroelectrical generator: Power for one family (Jim Keener) Moderate Head Hydro Head: height difference Between /

Their difference gives the kinetic energy per unit mass in angular motion that must be supplied to do the interchange, deltaEk = Efinal − Einitial.»

It can be shown that this is Eb [equation 4] Then the potential energy per unit mass released by exchanging the two mass elements is PE = − (deltaEk + deltaEb).

Gasoline, diesel, jet fuels, etc. pack a lot of energy per unit, can be burned pretty clean, do not destroy engines, are readily available, cost much less energy to produce than what they provide, and do not distort things like food supplies or national budgets to use.

As fossil fuels have plunged in price, the cost of subsidizing «green» energy per unit of such energy has increased enormously since the cost differential has greatly increased, and this will have to be subsidized by someone — usually primarily at the expense of less affluent ratepayers — in one way or another.

That should be a quantity proportional to the kinetic energy per unit vertical distance at that altitude.

1) Start by computing the total GHG - free air constant mass per unit area of a gas layer between any two heights under gravity g 2) Add in the hydrostatic equilibrium pressure change with height in the gravity field 3) Compute the total enthalpy per unit area of the layer realizing the layer possesses potential energy per unit area in earth's gravity field 4) From that, realize energy conservation imposes a constraint that total dry static energy is constant in the layer (within adiabatic control volume) 5) From this, realize and compute the total entropy (S) of the layer over the height of the layer 6) Transform S computation from height to pressure by way of hydrostatic eqn.

So the energy per unit volume goes like (z + z0).

But cleanliness has nothing to do with power in physics, which is simply energy per unit time.

To me, a «slowing down» of the cooling of an object means less energy per unit time leaves the object.

For example, (a) Assume a black body exists internal to which is an energy source supplying a fixed amount of energy per unit time.

Assume a fixed rate of energy per unit time is being absorbed by and / or generated within an object; and at temperature T the object is in «heat transfer» equilbrium — i.e., the amount of outgoing energy per unit time is equal to the incoming radiation per unit time.

I accept the idea that for a system surrounded by a vacuum when radiation - rate - equilibrium is reached, the amount of energy per unit time leaving a system via radiation is equal to the amount of energy per unit time entering the system.

«Inverse - square law The intensity (or illuminance or irradiance) of light or other linear waves radiating from a point source (energy per unit of area perpendicular to the source) is inversely proportional to the square of the distance from the source; so an object (of the same size) twice as far away, receives only one - quarter the energy (in the same time period).»

During summer, urban masonry and asphalt absorb, store, and reradiate more solar energy per unit area than do the vegetation and soil typical of rural areas.

It has great energy per unit mass (which is why space rockets use it, particularly in the upper states), but its energy per unit volume is very poor (not to mention it has to be cooled to -253 °C to be liquified).

I should qualify the statement in the first sentence above; my calculations indicate that it is true in South Australia and in terms of the amount of energy per unit mass of fuel.

It doesn't make sense to divide this by years because it is already energy per unit time.

The reason is easy to understand: renewable fuels are energy - diffuse, meaning that there is very little energy per unit of mass compared to both fossil fuels and uranium.

Measured in terms of the energy per unit time and area lost by the surface (Wm ^ -2).

Natural gas is widely considered to be an environmentally cleaner fuel than coal because it does not produce detrimental by - products such as sulfur, mercury, ash and particulates and because it provides twice the energy per unit of weight with half the carbon footprint during combustion.

We should be concentrating on converting sugars to dimethylfuran, which contains approximately the same energy per unit of mass as gasoline.

The crystal lattice of our Himalayan Pink Salt Blocks has a high specific energy (energy per unit of mass), so they hold any temperature you bring it to for a good while.

This also helps the oxygen part of the equation because you produce more energy per unit of oxygen.

First, overall, it seems that a high - fat diet can provide more energy per unit of mass than that of carbohydrates.

The advantages of the new technology over the current are basically these: Remarkable passive safetyExtraordinary amounts of energy per unit of fuelTruly negligible quantities of much shorter lived waste The thermal baffle being lowered into the 500 MWe Prototype Fast Breeder Reactor in India, May 2010.

Cathode performance is measured in energy per unit weight, called watt - hours per kilogram.

But the technology still has limitations: It is costly, it delivers about 1/40 as much energy per unit weight as petroleum, and if overheated or overcharged, it could burst into flames.

They found that because natural gas plants are overall more efficient than coal plants, producing more energy per unit of carbon, they could cause less warming in the long term.

The sum of this lost energy per unit time has been dubbed «rainpower.»

Xia believes the specific energy (the energy per unit mass) of the battery is still low compared with commercialized lithium - ion batteries, and the assembly process needs to be further optimized.

Not exact matches

Energy bills are made up of unit costs per kWh and consumption used between two periods.

RICHMOND, Va., April 20, 2018 / PRNewswire / — The board of directors of Dominion Energy Midstream GP, LLC, the general partner of Dominion Energy Midstream Partners, LP (NYSE: DM), has declared a first - quarter 2018 cash distribution of $ 0.3340 per common and subordinated unit — an increase of 5 percent above the fourth - quarter 2017 distribution — which corresponds to an annualized distribution rate of about $ 1.34 per such unit.

NGL Energy Partners declared a quarterly distribution of $ 0.39 per unit and revised its fiscal year 2017 and fiscal year 2018 outlook.

For example, resource use could be measured in terms of units of energy used per person.

Minimizes energy consumption by 30 - 70 % per unit of land by eliminating the energy required to manufacture synthetic fertilizers, and by using internal farm inputs, thus reducing fuel used for transportation

Investment in more efficient technologies and streamlined processes is expected to see energy consumption (per unit of production) drop by 16 % by next year (compared to 2010).

Learn how to use an online calculator to help track your Water use, Energy use, Greenhouse Gas (GHG) emissions, and Applied Nitrogen per unit of production

Table 3 below shows figures on energy consumption (GJ) both per hectare and per unit of output (t) for different crops, comparing organic and conventional agriculture systems in Germany, Italy, Sweden and Switzerland.