at current US reserves, how long will natural gas last? - correct answer ✔✔86 years
which size of particulates are the most harmful to human health? - correct answer ✔✔0.1 micron to
2.0 microns
the three main problems with fossil fuels are they non-renewable (fixed amount), pollution and climate
change - correct answer ✔✔true
as population increases, energy consumption increases - correct answer ✔✔true
human development (health, nutrition, education, housing) and a high level of energy use are
correlated- we rarely see one without the other - correct answer ✔✔true
what is energy - correct answer ✔✔the capacity to do work
what is the form of energy contained in a dam called? - correct answer ✔✔potential
a BTU is defined as the amount of enery required to raise the temperature of one lb. of water by one
degree celsius - correct answer ✔✔false
the process of two smaller nuclei combining into one larger nucleus - correct answer ✔✔nuclear
fusion
the process of one larger nucleus dividing into two smaller nuclei - correct answer ✔✔nuclear fission
oil and natural gas typically form in what environment - correct answer ✔✔marine life preserved at
the bottom of deep lakes
which fossil fuel contains ash - correct answer ✔✔coal
, how many ranks of coal are there - correct answer ✔✔four
which coal rank has the highest heating value - correct answer ✔✔anthracite
which is more expensive, $100/ton of coal or $3/MCF of natural gas - correct answer ✔✔the coal
what is work - correct answer ✔✔force * displacement
a power plant produces 50 MJ of useful energy and 200MJ of wasted heat. what is the efficiency? -
correct answer ✔✔20%
what is the main use of petroleum - correct answer ✔✔transportation
what is the main component of natural gas - correct answer ✔✔methane
which fossil fuel is the cleanest burning - correct answer ✔✔natural gas
is the US a net importer or net exporter of natural gas - correct answer ✔✔net exporter
how much did the temperature warm from 1850 to 2007? - correct answer ✔✔0.85 degrees Celsius
how much carbon dioxide have we emitted into the atmosphere by burning fossil fuels since the
industrial revolution - correct answer ✔✔half a trillion tons
if a solar farm generates 10MW in Arizona (320 sunny days per year) is moved to Pennsylvania (160
sunny day a year) what is the new power output - correct answer ✔✔5 MW
layers of silicon that directly convert sunlight into an electric current - correct answer ✔✔photovoltaic
cells