physics concepts and connections 5th edition No hand written answers please. Que

Question

physics concepts and connections 5th edition No hand written answers please. Question #4 CHAPTER O PRE-LAB QUESTIONS 0.2 Pre-Lab 2: Diffusion Naane Section Date Reading: Hobson Ch.2, section 2.1 section 22 Try to understend the comment of fg 2.I of the teztbook. Reew section 2.3 of the lab on diffusion Question :1 Defin, diffusion. Hint: Look it up in Wikipedia, the free online encyclopedia. ur ky words such as molecular dffusion, Brouwnian motion Figure 3 shows a cartoon of a randoen walker. Initially, the walker starts at 0. A coin is tossed and the walker moves one position to the right if the coin lands heads" and one position to the left if the coin lands Tails". We represent the position of the walker by a number r . Perform your own random walker experimest. Start at r-0 and toss a coin 20 times For each Tails subtract I from r, and for each "heads" add I to r. Record this in a table. Note that r can be positive or negative . Read the section How to draw graphs" in the istroduction to the lab manual. Draw a graph of r vs N (the munber of coin tossws), following the guidelives set out in the introduction. -2 0. Figure 3: The randon walker. If the coin-toss is "heads" the walker moves one step to the right; if the coin-toss is "tails" the walker moves one step to the left. In this figure, the walker is moving from r 0 to

Explanation / Answer

Question 4# The estimate of |r| for a single random walker after 30 coin tosses read from the given graph is approximately 5 steps away from the origin. Note that this estimate is also valid for N number of random walkers. But the confidence in the estimate is more when we have more number of random walkers. As can be seen from the graph, fluctuation in |r| is more when number of random walkers is small. Thus, we will have less confidence in the estimate for single random walker.

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