What accommodations can be made for people with impaired vision?
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Answer:
The energy of an electron in the 8th shell is given by: -0.2125 eV
The number of subshells is: 8
The number of orbitals is: 64
The number of electrons that fit on this shell is: 128
Explanation:
First, we find the energy of the electrons in the 8th shell. In order to do this, we recall that the energy of an electron (in the Hydrogen atom) whose principal number is n is given by:
Substituting n=8, we find that the energy is given by:
In order to find the number of subshells we recall that, for a given principal quantum number n, the possible values of the quantum number l, which corresponds to the number of subshells are:
0, 1, 2, ... , n-1
Since n = 8 in our problem, the possible values of l are: 0, 1, 2, 3, 4, 5, 6, 7. Therefore, the number of subshells are 8.
Now we continue with the number of orbitals. For every subshell l, we have 2l+1 possible values of m, which correspond to the orbitals. Since the possible values of l are: 0,1,2,3,4,5,6,7, therefore, we have to perform the sum:
And we can conclude that the number of orbitals is equal to 64.
Finally, we know that we can fit two electrons per orbital, therefore we can have 64*2 = 128 electrons in the shell corresponding to n=8.
Answer:
The angular velocity is
Explanation:
From the question we are told that
The mass of the block is
The of the pulley is
The radius of the pulley is
The radius of the cord around the pulley is
The distance of the block to the floor is
From the question we are told that the moment of inertia of the pulley is
Substituting value
Using the Newtons law we can express the force acting on the vertical axis as
=>
Now when the pulley is rotated that torque generated on the massless cord as a r result of the tension T and the radius of the cord around the pulley is mathematically represented as
Here is the angular acceleration
Here is the torque which can be equivalent to
Substituting this above
Substituting for T
Here is the linear acceleration which is mathematically represented as
making the subject
Substituting values
Now substituting into the equation above to obtain the acceleration
This acceleration is
and v is the linear velocity with is mathematically represented as
Substituting this into the formula acceleration
making t the subject
substituting value
Now the linear velocity is
The angular velocity is
So
Generally 1 radian is equal to 0.159155 rounds or turns
So 5.59 radian is equal to x
Now x is mathematically obtained as
Also
60 second = 1 minute
So 1 second = z
Now z is mathematically obtained as
z
Therefore