Both vectors should be declared to have the same number of elements.
vector<int> personName(50); vector<int> personAge(50)
Vector is a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude. Although a vector has magnitude and direction, it does not have position like a point.
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Answer:A
Explanation: number that shows the total atomic mass of the substance
Burning of gases is one the example of chemical change
Answer:
Number of electrons, 
Explanation:
It is given that,
Charge, q = 4.33 C
We need to find the number of electrons that make 4.33 C of charge. According to quantization of charge as :

n = number of electrons
e = electron's charge



So, the number of electrons are
Hence, this is the required solution.
Explanation:
It is given that,
Wavelength of monochromatic light, 
Slits separation, 
(a) We need to find the angle corresponding to the first bright fringe. For bright fringe the equation is given as :
, n = 1



(b) We need to find the angle corresponding to the second dark fringe, n = 1
So, 




Hence, this is the required solution.