The fuel plates in a nuclear reactor are 4 ft long and stacked with a 1/2-in. gap between them. the heat flux along the plate surfaces varies sinusoidally according to the equation where α-250 btwh ft. β-1500 btwh ft, x is the distance from the leading edge of the plates, and l is the total plate length. if air at 120°f, 80 psi, flowing at a mass velocity of 6000ibm/hft2, is used to cool the plates, prepare plots showing a. the heat flux vs. x b. the mean air te 19.5 given the information in problem 19.4, determine the total heat transferred for a stack of plates with a combined surface area of 640 ft, each plate being 4 ft wide.

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

What? i don’t understand

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : )