# What is the FAA requirement for the maximum slope of a passenger boarding ramp?

In order to comply with the American Disabilities Act (ADA), the maximum ramp gradient is 1:20

### What is mountain boarding?

mountain boardinga.k.a all terrain boarding, dirt boarding. mountain boarding is a combination of snowboarding and skate boarding it has open heel bindings and trucks (the turning mechanisms of the board) it has different aspects like boarder cross (racing down a man built coarse) slope style (a park with table tops grinds ect. free ride (going down a hill not knowing where your going). what makes it different from other board sports is the range of…

### Why does slope matter?

I am assume that you mean the slope of a graph. We find the local maximum and minimum of a graph by comparing the slope (the tangent to the curve) at each point. When the graph is reaching either a maximum or minimum, the slope becomes zero. This finding-the-zero-slope task is normally done with computer programming or Excel. Another use is that the change in slope indicates a change in the rate. Let us say…

### How does the second deriative work i understand the first deriative but i dont really understand how the second deriative gives you the answer of a whether a stationary point is a minimum or maximum?

The first deriviative is the slope of the function. Your understanding is somewhat correct, in that when the first deriviative is zero, the function is at a minimum or a maximum. (Or an inflection point) Take this one step further. The second deriviative is the slope of the first deriviative. Take a moment to understand what this means... If the slope of a function is positive, then the value of the function is increasing. If…

### What is the minimum slope permitted for 6 inch underground sewer pipe?

1/4" per ft. is the lowest allowed. 1. Allowed by whom? Not many regulatory authorities specify the minimum slope of a 6" sewer pipe. 2. Why state in inches, typically engineers use a 2.0% or 0.02 / 100' form for the answer. 3. Using Manning's of 0.013 (although most PVC could use a 0.009 or 0.011 n factor, you can achieve the 2 ft/sec typical requirement with a slope of 0.005 or 0.5%, although it…