Plutonium-239 builds up in reactor fuel at a rate that depends on the probability of neutron capture by
(all reactor fuel contains more
than
). Reactors designed specifically to make plutonium are called
breeder reactors . They seem to be inherently more hazardous than conventional reactors, but it remains unknown whether their hazards can be made economically acceptable. The four reactors at Chernobyl, including the one that was destroyed, were built to breed plutonium and produce electricity. These reactors had a design that was significantly different from the pressurized water reactor illustrated above.
Plutonium-239 has advantages over
as a reactor fuel — it produces more neutrons per fission on average, and it is easier for a thermal neutron to cause it to fission. It is also chemically different from uranium, so it is inherently easier to separate from uranium ore. This means
has a particularly small critical mass, an advantage for nuclear weapons.
Phet explorations: nuclear fission
Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor!
Test prep for ap courses
Which of the following statements about nuclear fission is true?
No new elements can be produced in a fission reaction.
Energy released in fission reactions is generally less than that from fusion reactions.
In a fission reaction, two light nuclei are combined into a heavier one.
Fission reactions can be explained on the basis of the conservation of mass-energy.
When
235 U is bombarded with one neutron, the following fission reaction occurs:
.
Find the values for
x and y.
Assuming that the mass of
235 U is 235.04 u, the mass of
141 Ba is 140.91 u, the mass of
92 Kr is 91.93 u, and the mass of
n is 1.01 u, a student calculates the energy released in the fission reaction as 2.689 × 10
−8 , but forgets to write the unit. Find the correct unit and convert the answer to MeV.
Nuclear fission is a reaction in which a nucleus is split.
Fission releases energy when heavy nuclei are split into medium-mass nuclei.
Self-sustained fission is possible, because neutron-induced fission also produces neutrons that can induce other fissions,
, where
and
are the two daughter nuclei, or fission fragments, and
x is the number of neutrons produced.
A minimum mass, called the critical mass, should be present to achieve criticality.
More than a critical mass can produce supercriticality.
The production of new or different isotopes (especially
) by nuclear transformation is called breeding, and reactors designed for this purpose are called breeder reactors.
Questions & Answers
Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you.
Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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