Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Ivo:
--- Quote from: Shazizzzle on May 26, 2010, 10:19:49 am ---Two things.
First of all, aren't beta particles electrons? Why, then are they emitted from the NUCLEUS, as states Q38 of M/J 2008, P1? :S ???
Secondly, O/N 2005, Q36, P1, I know you said that a neutron splits to form an electron and proton, but why can't we use the simple beta emission formula here. The -1B particle, where A remains A, and Z + 1? :S Isn't that formula for unstable nuclei too? Because, a stable one doesn't emit anything.
--- End quote ---
For your first question, it is simple. If there are radioactive (unstable) nuclei, then it decays to becoming more stable. However, during the process of decay, a beta particle is emitted from the nucleus. And yes, beta particles are electrons.
Weaam:
--- Quote from: 8T on May 26, 2010, 10:19:20 am ---Lol mish laha ldaraji :P
U already spelled my name .. wtvr
Anyway umm trace it bak may june 03 q 3 b P1V1=P2V2
Do we convert cm^3 to m^3 since Pa (N/m^2)??
--- End quote ---
Oh yeaaah, sorry abt that :P
Vin:
--- Quote from: Ivo on May 26, 2010, 10:22:25 am ---For your first question, it is simple. If there are radioactive (unstable) nuclei, then it decays to becoming more stable. However, during the process of decay, a beta particle is emitted from the nucleus. And yes, beta particles are electrons.
--- End quote ---
what about positrons ?? they are beta decay too right ??
Ghost Of Highbury:
--- Quote from: Shazizzzle on May 26, 2010, 10:19:49 am ---Two things.
First of all, aren't beta particles electrons? Why, then are they emitted from the NUCLEUS, as states Q38 of M/J 2008, P1? :S ???
Secondly, O/N 2005, Q36, P1, I know you said that a neutron splits to form an electron and proton, but why can't we use the simple beta emission formula here. The -1B particle, where A remains A, and Z + 1? :S Isn't that formula for unstable nuclei too? Because, a stable one doesn't emit anything.
--- End quote ---
In beta decay, the weak interaction converts a neutron (n) into a proton (p) while emitting an electron (e-)
First) 38)m/j06. As the above states, the electron comes from the neutron, the neutron is in the nucleus.
Second) When a beta particle is emitted, The mass remains the same, because a neturon is replaced by a proton, the no. of neutrons decrease , no. of proton increases.
Ivo:
--- Quote from: Shazizzzle on May 26, 2010, 10:19:49 am ---Two things.
First of all, aren't beta particles electrons? Why, then are they emitted from the NUCLEUS, as states Q38 of M/J 2008, P1? :S ???
Secondly, O/N 2005, Q36, P1, I know you said that a neutron splits to form an electron and proton, but why can't we use the simple beta emission formula here. The -1B particle, where A remains A, and Z + 1? :S Isn't that formula for unstable nuclei too? Because, a stable one doesn't emit anything.
--- End quote ---
145 0 145
A -> beta + Z
92 -1 93
Answer is D, oui ou non?
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