Which of the following energy sources has the lowest EROI quizlet?
Hydroelectric has the highest EROEI, whereas nuclear has the lowest.
Which energy source has highest EROI?
Hydroelectric power generation systems Hydroelectric power generation systems have the highest mean EROI value, 84:1 (n of 17 from 12 publications), of electric power generation systems (see Lambert et al., 2012 for references) (Fig. 3).
What energy source has the lowest net energy yield?
What energy source has the lowest net energy yield for transportation? Hydrogen actually has a negative net energy yield because it takes more energy to produce it than it yields when used.
What is the EROI of an energy source?
Energy Return on Investment (EROI) is the amount of energy expended to produce a certain amount of net energy. EROI is an important determinant in energy commodity and electricity pricing. EROI decreases when energy becomes scarcer and more difficult to extract or produce.
Which of the following would have the least penetrating power into matter?
Alpha particles Alpha particles are positively charged helium nuclei. Hence, in comparison to beta particles and gamma rays, they have considerable mass and charge and hence, they have the least penetrating power.
What is the leading source of energy used in the United States today quizlet?
The energy mix of our input is 84% fossil fuel, 9% nuclear fuels and 7% renewable energy resources. The U.S. produces 70% of the energy it needs. Nearly 30% of our energy comes from other countries, primarily in the form of petroleum imports. Industry uses the most energy, followed by the transportation sector.
What does a low EROI mean?
“A very low EROI means most people have to work in the energy-supply industries. One could reduce our EROI to 2.5:1 and survive, but there would be… (fewer) possibilities for other activities.” At the same time, he conceded that “EROIs make a little more sense for a finite fossil fuel resource, like an oil field.
What is the EROI of solar energy?
So what is the EROI of solar energy? Studies have given figures for the EROI of solar energy as low as 3.9 and as high as 45.45.
What is the EROI of nuclear energy?
An EROI of about 7 is considered break-even economically for developed countries, providing enough surplus energy output to sustain a complex socioeconomic system. The US average EROI across all generating technologies is about 40.
What is the EROI of natural gas?
Typically natural gas is used, either directly combusted for process heat or used to power an electricity generating turbine, which then uses electrical heating elements to heat the underground layers of shale to produce oil from the kerogen. Resulting EROI is typically around 1.4-1.5.
Why is alpha The least penetrating?
Alpha particles, because they are highly ionising, are unable to penetrate very far through matter and are brought to rest by a few centimetres of air or less than a tenth of a millimetre of biological tissue (Figure 2).
Which among the following has the least penetrating power Mcq?
Alpha particles So, Alpha particles have the least penetrating power.
Which of the following is the highest energy consumption by source quizlet?
The most used energy source is oil, 33% of the global energy supply, followed by coal, 30%.
What is the source of energy quizlet?
Sources of energy have evolved from human and animal power to fossil fuels, uranium, water power, wind, and the Sun. Non-renewable fossil fuels crude oil, natural gas, coal, oil shale and tar sands) . Non-renewable energy is energy produced by burning fossil fuels such as coal.
Does nuclear energy have a high EROI?
America's present EROI averages about 40. A mix of 50% renewables, 30% fossil and 20% nuclear gives an average EROI of about 25.
Which conventional energy alternative has the highest EROI of any modern energy source?
Abstract: A high energy return on energy investment (EROI) of an energy production process is crucial to its long-term viability. The EROI of conventional thermal electricity from fossil fuels has been viewed as being much higher than those of renewable energy life-cycles, and specifically of photovoltaics (PVs).
Which has the least penetrating power?
Alpha radiations Alpha radiations have the least penetrating power as they are massive in nature. Gamma rays are the most penetrating of all the radiations. As penetration depends on particles' size, the bigger the size lesser the penetration power, and α particles are bigger, followed by β and then γ.
Which of the following has the least penetrating power?
Alpha particles So, Alpha particles have the least penetrating power.
Which type of radiation is the least?
Gamma rays have the highest energy and shortest wavelength. Then come X-rays, ultraviolet light, visible light, infrared radiation and microwave radiation. Finally, radio waves have the lowest energy and longest wavelength.
What are the three largest sources of energy used today quizlet?
Oil, natural gas, and coal. What are the three largest sources of energy used today?
Which of the following is the largest source of renewable energy quizlet?
Hydroelectric is currently the largest renewable energy source.
Which source of energy is used most in America quizlet?
The energy mix of our input is 84% fossil fuel, 9% nuclear fuels and 7% renewable energy resources. The U.S. produces 70% of the energy it needs. Nearly 30% of our energy comes from other countries, primarily in the form of petroleum imports.
What are the main sources of energy on earth?
The primary sources of energy in the environment include fuels like coal, oil, natural gas, uranium, and biomass. All primary source fuels except biomass are non- renewable. Primary sources also include renewable sources such as sunlight, wind, moving water, and geothermal energy.
What is the EROI for nuclear?
America's present EROI averages about 40. A mix of 50% renewables, 30% fossil and 20% nuclear gives an average EROI of about 25.
Which type radiation is least penetrating?
Alpha Alpha is the least penetrating, while gamma is the most penetrating. Nonetheless, all three are ionising radiation: they can knock electrons out of atoms and form charged particles.
Which among the following has the least penetrating power answer a o radio waves B o microwaves C O ultraviolet radiation d/o gamma rays?
Therefore, the correct option is A) alpha particles.
Which is the least penetrating type of radiation?
alpha There are three types of nuclear radiation: alpha, beta and gamma. Alpha is the least penetrating, while gamma is the most penetrating. Nonetheless, all three are ionising radiation: they can knock electrons out of atoms and form charged particles.
What are some examples of low energy waves?
Radio waves Radio waves are an example of low energy waves. At the other end of the spectrum, there are very high energy waves. Gamma rays are an example of high energy waves.
Which of the following has the lowest wave frequency?
radio waves Under the electromagnetic spectrum, visible light has the lowest frequency among the given option. The spectrum ranges from radio waves having low frequency till gamma rays, having the highest one.
Which of the following renewable energy sources has the lowest power density?
They found that power densities can vary by as much as 1000 times, with biomass the lowest (at 0.8 W/m2) and natural gas the highest (at 1000 W/m2). Solar and wind power needs around 40-50 times more space than coal and 90-100 times more space than gas.