EGEE Final PowerPoint

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Which size of particulates are the most harmful to human health?

0.1 micron to 2.0 microns

How much did the temperature warm from 1850 to 2007?

0.85 C

Nuclear fuel rods are _____ uranium by concentration

1-2%

After a uranium based fuel rod has spent 3 years in a reactor, how much of its uranium has been used?

10%

Approximately how much stronger to climate models predict extreme weather like hurricanes will become 2100?

10%

the temperature at which nuclear fusion becomes possible

13 million C

A power plant produces 50 MJ of useful energy and 200 MJ of wasted heat. What is the efficiency?

20%

What percentage of the world's electricity comes from hydroelectric dams?

20%

if a solar farm requires 40 acres in Iowa (210 sunny days per year), how much land would it require in Nevada (350 sunny days per year)?

24 acres

At current US reserves, how long will coal last?

283 years

A hydropower dam is rated for 1 GW power generation. The annual energy output is 4380 GWh. What percentage of its capacity is used?

50%

A proximate analysis shows that a certain lignite coal is 10% moisture, 30% volatiles, and 10% ash. What is the % fixed carbon?

50%

If there are 6,500 TCF of proved reserves of natural gas in the world and we are consuming 123 TCF per year, how long until we run out?

52.8 years

Beth's law dictates that the maximum efficiency that can be achieved with a wind turbine is

59%

At current US reserves, how long will natural gas last?

86 years

Which coal rank has the highest heating value?

Anthracite

Which fossil fuel contains ash?

Coal

A BTU is defined as the amount of energy required to raise the temperature of on pound of water y one degree celsius.

False

Oil and natural gas typically form in what environment

Marine life preserved at the bottom of deep lakes

The process of one larger nucleus DIVIDING into two smaller nuclei

Nuclear FISSION

The process of two smaller nuclei combining into one larger nucleus

Nuclear fusion

What is energy?

The capacity to do work.

As population increases, energy consumption increase

True

The sun delivers approximately 10,000 times more energy per second to the earth than the whole world's population uses

True

Radioactive decay that emits two protons and two neutrons

alpha decay

Which of the fossil fuels are regional commodities with regional prices?

coal and natural gas

The problem of needing to install large transmission capacity to move electrons from the power generation source to a market?

location problem

What is the main component of natural gas?

methane

Which fossil fuel has the highest heating value per pound?

natural gas

Which fossil fuel is the cleanest burning?

natural gas

Geothermal power plants are best when located

near rift zones

Is the US a net importer or exporter of natural gas?

net exporter

Installing radiant flooring, insulting windows, and heavy curtains to absorb the sun's warmth

passive solar heating

How long has hydraulic fracturing "fracking"been being performed in the US?

since 1947

Which is more expensive, $100/ton of coal or $3/MCF of natural gas/

the coal

A power plant produces 50 MJ of useful energy and 100 MJ of wasted heat. What is the Efficiency?

33%

If a solar farm generates 10 MW in Arizona (320 sunny days per year) is moved to Pennsylvania (160 sunny days per year), what is the new power output?

5 MW

What is work?

Force x displacement

What is the form of energy contained in a dam called?

Potential

In the past, decreasing fertility rates were associated with decreasing poverty levels?

TRue

How much carbon dioxide have we emitted into the atmosphere by burning fossil fuels since the industrial revolution?

half a trillion tons

The challenge associated with wind energy that fluctuates throughout the day

intermittency

Layers of silicon that directly convert sunlight into an electric current?

photovoltaic cells

The challenge associated with wind energy whose power output cannot be forecast in advance

predictability

What percentage of the US's electricity comes from hydroelectric dams?

7%

Nuclear, wind, solar, and hydropower are all renewable forms of energy

False

Weather and climate are the same thing

False

The three main problems with fossil fuels are that they are non-renewable (fixed amount) solution, and climate change.

True

Wind is caused by uneven heating of the Earth's surface

True

Biomass is essentially carbon neutral

true

if h = 3 meters, q = 3 cubic meters per second, and efficiency is 50%, what is the power output in watts? Assume 9.81

44,145 Watts

A calorie is defined as the amount of energy required to raise the temperature of one pound of water by one degree CELSIUS

False

How many ranks of coal are there?

Four

What is the main use for petroleum?

Transportation

Human development (health, nutrition, education, housing) and a high level of energy use are correlated we rarely see on without the other

True

The consensus of the scientific community is that deep geologic storage of high level radioactive waste is a safe long term solution

True

Reflecting sunlight off of mirrors to create concentrated heat for generating steam to rotate a turbine to induce an electric current

solar thermal energy conversion

What is the largest energy consumer at home?

space heating

a technology that extracts energy out of waves

tidal energy

Panels that use sunlight to heat up air or water and transfer it to your forced air heating or residential water heater

active solar heating


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