Hi I realllyyy neeed helppp to do this lab can anyone please help me and I suppo

Question

Hi I realllyyy neeed helppp to do this lab can anyone please help me and I suppose to find the distance on 4 and 5 there is a Wave motion stimpulation to use for this lab please go to the website provide and I Think you need to click on it thank you please I need it by tonight thank you. Note. you need to follow the first step to adjust the stimpulation thank you

http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html

1.Set the following settings:

Choose Pulse

Set the Amplitude to 50

Set the Damping factor to zero

Choose Fixed End

Check both the Ruler and Time boxes

Set Pulse Width to 50

2.Observe the wave that you’ve created for about thirty seconds. Describe your observations. (Record its measured amplitude and any other observations about what it looks like.

3.What do you think pulse means?

4.How much distance does one pulse travel from end to end?

5.Use the timer to determine how long it takes the pulse to travel the distance measured in #4.

6.Calculate the wave speed (or velocity) with your answers from #4 and #5.

7.Reset the pulse wave back to its starting position and observe what happens as the pulse collides with a fixed end. Record your observations (note any changes in amplitude & direction).

8.Reset the pulse wave back to its starting position and select “Loose End” instead of Fixed End. Now observe what happens as the pulse wave collides with a free end. Record your observations (note any changes in amplitude & direction).

Explanation / Answer

2. The amplitude of the wave is 22 cm. It is a triangular shaped pulse. the wavelength is nearly 25 cm.

3. pulse is a single disturbance that ,moves from one point to another

4. The pulse travels 95 cm from end to end.

5. The pulse takes about 2.7 seconds to reach the end.

6 therefore, wave speed=s/t=95/2.7=35.18 cm/s

7. the amplitude and direction gets reversed as it strikes the other end. This is nothing but reflection.

8.The pulse dies doesnot reverses its amplitude but the direction is reversed.

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