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I need help understanding the calculations written in blue  and how they got 0.8 and 0.4 for fiber b and how they calculated  the answer in blue i need a step by step calculation of how they got 0.232

I need help understanding the calculations written in blue  and how they got 0.8 and 0.4 for fiber b and how they calculated  the answer in blue i need a step by step calculation of how they got 0.232

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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I need help understanding the calculations written in blue 

and how they got 0.8 and 0.4 for fiber b and how they calculated 

the answer in blue i need a step by step calculation of how they got 0.232

(b) mine the travel time from finger to brain along each of the three fibers. Suppose the nerve fibers connect a finger to your brain, a distance of 1.2 m. Deter- Fiber A: d = vt → t= d/v= (1.2 m)/(2 m/s) = 0.6s Fiber C: d = vt → t= d/v= (1.2 m)/(25 m/s) =[0.048 s Fiber B is the tricky one. Two-thirds of the total distance (0.8 m) is covered at 25 m/s, and one-third of the total distance (0.4 m) is covered at 2 m/s. 0.8 m = = (25 m/s) t1 → t1 = 0.032 s 0.4 m = (2 m/s) t2 → t2 = 0.2s ti + t2 = 0.232 s
Transcribed Image Text:(b) mine the travel time from finger to brain along each of the three fibers. Suppose the nerve fibers connect a finger to your brain, a distance of 1.2 m. Deter- Fiber A: d = vt → t= d/v= (1.2 m)/(2 m/s) = 0.6s Fiber C: d = vt → t= d/v= (1.2 m)/(25 m/s) =[0.048 s Fiber B is the tricky one. Two-thirds of the total distance (0.8 m) is covered at 25 m/s, and one-third of the total distance (0.4 m) is covered at 2 m/s. 0.8 m = = (25 m/s) t1 → t1 = 0.032 s 0.4 m = (2 m/s) t2 → t2 = 0.2s ti + t2 = 0.232 s
7. Nerve impulses are electrical signals that propagate along nerve fibers consisting of many axons connected end-to- end. Axons come in two varieties: insulated (covered with a myelin sheath) and uninsulated. Myelinated axons con- duct nerve impulses at a speed of about 25 m/s, which is much faster than unmyelinated axons (about 2.0 m/s). The figure shows small portions of three nerve fibers consisting of axons of equal size. Two-thirds of the axons in fiber B are myelinated. Unmyelinated fiber A Partially myelinated fiber B individual ахоns Fully myelinated fiber C
Transcribed Image Text:7. Nerve impulses are electrical signals that propagate along nerve fibers consisting of many axons connected end-to- end. Axons come in two varieties: insulated (covered with a myelin sheath) and uninsulated. Myelinated axons con- duct nerve impulses at a speed of about 25 m/s, which is much faster than unmyelinated axons (about 2.0 m/s). The figure shows small portions of three nerve fibers consisting of axons of equal size. Two-thirds of the axons in fiber B are myelinated. Unmyelinated fiber A Partially myelinated fiber B individual ахоns Fully myelinated fiber C
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