Biology, 21.09.2021 01:00 aidanfbussiness
1. The atomic number of uraniun-235 is 92. its half-life
is 704 million years, and the radioactive decay of 1 kg
of 235U releases 6.7 x 10^13 J. Radioactive material
must be stored in a safe container or buried deep
underground until its radiation output drops
to a safe level Generally, it is considered "safe" after 10
half-lives
(a) Assume that a nuclear power plant can convert
energy from 235U into electricity with an
efficiency of 35 percent, the electrical transmission
lines operate at 90 percent efficiency and
fluorescent lights operate at 22 percent efficiency
(1) What is the overall efficiency of
converting the
energy of 235U into
fluorescent light? (2 points)
(ii) How much energy from 1 kg of 235U is
converted into fluorescent light?
(2 points)
(hi) Name one way in which you could
improve the overall eficiency of this
system Explain how your suggestion
would improve efficiency. (2 points)
(b) What are the first and second laws of
thermodynamics? (2 points)
Answers: 2
Biology, 21.06.2019 19:40, HannyBun
Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.
Answers: 1
Biology, 21.06.2019 20:20, briannabo08
Ineed a chemical reaction takes place in which erlergy is released. arrange the reaction's characteristics in order from start to finis lower energy of reactants higher energy of products higher energy of reactants transition state sd lower energy of products
Answers: 1
Biology, 22.06.2019 09:00, nireegnu
The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer
Answers: 2
1. The atomic number of uraniun-235 is 92. its half-life
is 704 million years, and the radioactive...
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