A civil engineer is studying a left-turn lane that is long enough to hold seven cars. Let X be the number of cars in the line at
the end of a randomly chosen red light. The engineer believes that the probability that X = x is proportional to (x + 1)(8 − x) for x = 0, . . . , 7 (the possible values of X), i.e. P(X = x) = ( C(x + 1)(8 − x) for x = 0, 1, . . . , 7 0 otherwise 1. Determine the value of C. 2. Find the probability that X will be at least 5.
2 answers:
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Answer:
The percentage of silicon atoms per unit volume that are displaced in the single crystal lattice = 0.001 %
The percentage of silicon atoms per unit volume that are displaced in the single crystal lattice with boron atoms = 0.4 × %
Explanation:
No. of phosphorus atoms = 5 ×
The volume occupied by a single Si atom
2 ×
= 5 ×
Put the values in above equation we get
PCT = %
These are the percentage of silicon atoms per unit volume that are displaced in the single crystal lattice.
(b).
No. of boron atoms = 2 ×
The volume occupied by a single Si atom
2 ×
= 5 ×
Put the values in above equation we get
PCT = 0.4 × %
These are the percentage of silicon atoms per unit volume that are displaced in the single crystal lattice.