Answer:
12 mins
Explanation:
The distance covered is 5 km, divide this by 25 to get the fraction of an hour it takes. Doing this you get .2, times this by 60 min (1 hour) to get how many mins it takes
The solution that would most likely be a strongest conductor of electricity is the solution that is most saturated or concentrated. This is because the atoms that are found within the aqueous solutions have become positively charged resulting to the attraction of negatively charged ions that are found in electricity. On the other hand, the least conductive from the aqueous solutions would be the most unsaturated one because of less conductive ions present.
Neurogenesis does not occur everywhere in the brain but is evident in the hippocampus and olfactory bulb and perhaps in the cerebral cortex. New neurons are born not from mature nerve cells but rather develop from neural stem cells that remain in our brains throughout life.
To solve this exercise it is necessary to take into account the concepts related to Tensile Strength and Shear Strenght.
In Materials Mechanics, generally the bodies under certain loads are subject to both Tensile and shear strenghts.
By definition we know that the tensile strength is defined as
![\sigma = \frac{F}{A}](https://tex.z-dn.net/?f=%5Csigma%20%3D%20%5Cfrac%7BF%7D%7BA%7D)
Where,
Tensile strength
F = Tensile Force
A = Cross-sectional Area
In the other hand we have that the shear strength is defined as
![\sigma_y = \frac{F_y}{A}](https://tex.z-dn.net/?f=%5Csigma_y%20%3D%20%5Cfrac%7BF_y%7D%7BA%7D)
where,
Shear strength
Shear Force
Parallel Area
PART A) Replacing with our values in the equation of tensile strenght, then
![311*10^6 = \frac{F}{(15*10^{-6})(30*10^{-2})}](https://tex.z-dn.net/?f=311%2A10%5E6%20%3D%20%5Cfrac%7BF%7D%7B%2815%2A10%5E%7B-6%7D%29%2830%2A10%5E%7B-2%7D%29%7D)
Resolving for F,
![F= 1399.5N](https://tex.z-dn.net/?f=F%3D%201399.5N)
PART B) We need here to apply the shear strength equation, then
![\sigma_y = \frac{F_y}{A}](https://tex.z-dn.net/?f=%5Csigma_y%20%3D%20%5Cfrac%7BF_y%7D%7BA%7D)
![210*10^6 = \frac{F_y}{15*10^{-6}30*10^{-2}}](https://tex.z-dn.net/?f=210%2A10%5E6%20%3D%20%5Cfrac%7BF_y%7D%7B15%2A10%5E%7B-6%7D30%2A10%5E%7B-2%7D%7D)
![F_y = 945N](https://tex.z-dn.net/?f=F_y%20%3D%20945N)
In such a way that the material is more resistant to tensile strength than shear force.
The answer would be 2.63. Your welcome. This has been changed to the correct answer.