Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms.

The key value is the equation of state parameter formula_1, the ratio between the dark energy pressure and its energy density.

Nuclear power is the primary source of energy in France.

The World Energy Council estimates that nearly two thirds of all primary energy is lost before it is converted to useful energy.

This is due not only to the higher concentration of metabolizable energy in grain than in roughages, but also to the higher ratio of net energy of gain to net energy of maintenance where metabolizable energy intake is higher.

Moreover, Russian gas represents only 6 7 of the EU s total primary energy supply.

Brazilian firms have been investing mostly in primary industries such as energy and mining, led by Petrobras in oil and energy (UNCTAD 2004a).

Around 80 of the world s primary energy today is carbon based coal, oil, and gas.

Interstage In a two stage thermonuclear weapon the energy from the primary impacts the secondary.

The secondary stage is imploded by x ray energy from the first stage, called the primary.

About 80 per cent of world primary energy is supplied from fossil fuels, a finite resource.

The student teacher ratio for females at the primary, middle and high school levels was 65 1, 36 1 and 11 1 in 2001 2002.

However, the ratio of resting metabolic rate to total daily energy expenditure can vary between 1.6 to 8.0 between species of mammals.

Since 1991 enrolment of girls in primary education has reached 48 per cent matching the ratio of boys to girls in the general population at that age.

The CO2 loss tells us the energy produced, if we know or can estimate the respiratory quotient (ratio of CO2 produced to oxygen used).

In 2008, 47.6 of Croatia's primary energy production structure comprised use of natural gas (47.7 ), crude oil (18.0 ), fuel wood (8.4 ), hydro power (25.4 ) and other renewable energy sources (0.5 ).

But thanks to the effort developed by the government, at the primary education level, the ratio of girls who attend this system has come to increase year after year.

This shows that student teacher ratio at the primary and high school levels was better for boys and at the middle level it is in favour of the girls.

The National Report on Education for all (EFA), 2000, reported that the mean teacher student ratio in primary schools was 1 23 and in secondary schools was 1 12.

Comparing the drop out rates of female and male students at primary level in 1999 and 2001, the number of female drop outs rate was lower than that of male drop outs rate (in 1999 the ratio was 0.77 1.01 and in 2001 the ratio was 1.01 1.23).

Overall pressure ratio is 28.0, with a bypass ratio of 4.66.

Overall pressure ratio is 30.4, with a bypass ratio of 5.15.

Nuclear power, both fission based and fusion based, is yet another possibility for vast, reliable, secure, and environmentally safe primary energy.

Aspect ratio

Aspect ratio

Keep ratio

Aspect ratio

Golden Ratio

Custom ratio

The ratio of the two is called the gyromagnetic ratio and is simply the half of the charge to mass ratio.

Total energy consumed at all power plants for the generation of electricity was 4,398,768 ktoe (kilo ton of oil equivalent) which was 36 of the total for primary energy sources (TPES) of 2008.

Preserve Aspect Ratio

Aspect Ratio Crop...

Aspect Ratio Crop

Maternal mortality ratio

And that continues into the future with the renewables that we're developing today, reaching maybe 30 percent of primary energy by mid century.

Non OECD countries account for 87 of the increase, so their share of world primary energy demand will rise from 51 to 62 .

However, while the absolute amount of worldwide renewable energy use has been rising significantly, the overall share of renewables in the world's total primary energy supply has increased only marginally over the past three decades.

Profitability index (PI), also known as profit investment ratio (PIR) and value investment ratio (VIR), is the ratio of payoff to investment of a proposed project.

Rural urban population ratio

In cosmology, the equation of state of a perfect fluid is characterized by a dimensionless number formula_1, equal to the ratio of its pressure formula_2 to its energy density formula_3 formula_4.

The primary demand for oil is as a transport fuel, with lesser amounts used for heating, energy, and as inputs for petrochemical industries like plastics.

In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.

Select constrained aspect ratio orientation.

In aerodynamics, the aspect ratio of a wing is the ratio of its length to its breadth (chord).