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the best solar panels currently available are about 13 efficient in converting sunlight to electricity a typical home
radioactive copper-64 decays with a half-life of 128 days a what is the value of k in s-1 b a sample contains 280 mg
in 1994 it was proposed and eventually accepted that element 106 be named seaborgium sg in honor of glenn t seaborg
there are four stable isotopes of iron with mass numbers 54 56 57 and 58 there are also two radioactive isotopes
strontium-90 and radon-222 both pose serious health risks 90sr decays by -particle production and has a relatively long
one type of commercial smoke detector contains a minute amount of radioactive americium-241 241am which decays by
there is a trend in the united states toward using coal-fired power plants to generate electricity rather than building
a cubic piece of uranium metal specific heat capacity 0117 jdegc g at 2000c is dropped into 100 l of deuterium oxide
a 150-l flask containing a sample of nitromethane is filled with o2 and the flask is heated to 100ordmc at this
the preparation of no2g from n2g and o2g is an endothermic reaction n2go2g yields no2g unbalanced the enthalpy change
the curie ci is a commonly used unit for measuring nuclear radioactivity 1 curie of radiation is equal to decay events
the first atomic explosion was detonated in the desert north of alamogordo new mexico on july 16 1945 what fraction of
fresh rainwater or surface water contains enough tritium to show 55 decay events per minute per 100 g of water
the most significant source of natural radiation is radon-222 222rn a decay product of 238u is continuously generated
a is zirconium metal capable of reducing water to form hydrogen gas at standard conditionsb write a balanced equation
a 010-cm3 sample of a solution containing a radioactive nuclide 5x103 counts per minute per milliliter is injected into
a 020-ml sample of a solution containing 31h that produces 37x103 cps is injected into the bloodstream of an animal
during the research that led to production of the two atomic bombs used against japan in world war ii different
a small atomic bomb releases energy equivalent to the detonation of 20000 tons of tnt a ton of tnt releases 4x109 j of
a proposed system for storing nuclear wastes involves storing the radioactive material in caves or deep mine shafts one
at a flea market youve found a very interesting painting done in the style of rembrandts dark period 1642-1672 you
consider the following informationi the layer of dead skin on our bodies is sufficient to protect us from most
which do you think would be the greater health hazard the release of a radioactive nuclide of sr or a radioactive
u-235 undergoes many different fission reactions for one such reaction when u-235 is struck with a neutron ce-144 and
algae grown in water containing some 18o in h2 18o evolve oxygen gas with the same isotopic composition as the oxygen