How is the amount of radiation calculated from a decay?
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What equations to use on this system to form a matrix AA with dimensions [n,n][n,n] and load vector qqwith dimension [n][n] ? I am trying to get vertical displacement ww.
w=A−1×qw=A−1×q
Boundary conditions are as follows:
w(o)=0w(o)=0
w(L)=0w(L)=0
ϕ(o)=0ϕ(o)=0
ϕ(L)=0ϕ(L)=0
It is becouse in any point of beam I can't make equation:
d2y/dx2∗E∗I=M=0d2y/dx2∗E∗I=M=0
so I can't get the exact values of displacement. The problem is that everywhere I look for solution it is done on a beam with continous load over entire beam or with at least one joint and I have only half of the beam covered with continous load and no joints.
From d4y/dx4∗E∗I=q=0d4y/dx4∗E∗I=q=0 again I have too many unknown values.
w=A−1×qw=A−1×q
Boundary conditions are as follows:
w(o)=0w(o)=0
w(L)=0w(L)=0
ϕ(o)=0ϕ(o)=0
ϕ(L)=0ϕ(L)=0
It is becouse in any point of beam I can't make equation:
d2y/dx2∗E∗I=M=0d2y/dx2∗E∗I=M=0
so I can't get the exact values of displacement. The problem is that everywhere I look for solution it is done on a beam with continous load over entire beam or with at least one joint and I have only half of the beam covered with continous load and no joints.
From d4y/dx4∗E∗I=q=0d4y/dx4∗E∗I=q=0 again I have too many unknown values.
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Explanation:
Average number of radioactive decays per unit time (rate) • or - Change in number of radioactive nuclei present: A = -dN/dt • Depends on number of nuclei present (N). During decay of a given sample, A will decrease with time.
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