Eve makes a simple series circuit using a battery and two light bulbs. Through how many paths will the current be able to travel
2 answers:
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Answer:
8.95ft
Explanation:
In order to develop this problem it is necessary to consider two concepts:
The first is the design of vertical curves through the general equation for the length of a curved vertical crest in terms of algebraic differences in grades. The second is the Design Controls for Crest vertical curves table (I attach a table at the end).
The aforementioned equation is given by:
Where,
L = leght of vertical curve
S = Sight distance
A = Algebraic difference in grades
Height of eye above roadway
height of object above roadway surface
From the table we know that for design speed of 60 mi/h the S is 570 ft, while the value of the rate of vertival curve K, for design speed of 50mi/h is 84.
Then we can calculate the Algebraic difference in grades through:
Applying the equation to find we have:
Solving for
Therefore the height of the driver's eye is 8.95ft
