Rub your index fingers gently over a piece of very coarse sandpaper a few times and rate its coarseness on a scale from 1 (very soft) to 7 (very coarse). After a minute or two, rub the same finger over the paper and again rate its coarseness. Did your perception of the coarseness change? How?
This assignment asks YOU to perform this very simple experiment. We can't tell you how YOU experience the coarseness.
I don't believe the people on this site EVER help anyone. Everytime people ask questions, especially in the homework help, there's never really any help. just remarks like that.
To answer this question, you would need to conduct a small experiment and observe your own perception of the coarseness of the sandpaper before and after rubbing your finger against it.
Here's how you can proceed:
1. Get a piece of very coarse sandpaper. You can find different grit levels at hardware stores or online.
2. Start by rubbing your index finger gently over the sandpaper a few times. Take note of the initial coarseness perception on a scale from 1 (very soft) to 7 (very coarse). Make sure to use consistent pressure while rubbing your finger.
3. After a minute or two, rub the same finger over the sandpaper again, applying the same pressure as before. Focus on your perception of coarseness and how it might have changed compared to your initial rating.
4. Rate the coarseness again on the same scale from 1 to 7. Analyze if your perception has changed, and if so, how it has changed. You can consider factors like your finger becoming desensitized to the coarseness or increased sensitivity due to prolonged contact.
Final note: The purpose of this experiment is to observe and analyze your subjective perception of coarseness before and after rubbing your finger against the sandpaper. Each person's experience may vary, so it's important to take note of your individual observations.