John measured the contact angle of one of his subjects after exercise to be 60 degrees. The subject's skin contact angle was measured again after the subject took shower and dried his skin. How would cleansing and drying affect the contact angle of skin?
Added by Amy R.
Step 1
The contact angle measures the wettability of a surface; a lower contact angle indicates higher surface hydrophilicity (more wettable), while a higher contact angle indicates hydrophobicity (less wettable). Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 91 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The rate of water loss from the skin of a hand was measured. Followingthe measurement, the hand was soaked in alcohol for 15 minutes. Afterall the alcohol had been removed from the hand, the rate of waterloss was again measured. Compared with the rate of water loss beforesoaking, what difference, if any, would you expect in the rate of waterloss after soaking the hand in alcohol?
Sri K.
The cleansing ability of soap depends in large part on its ability to change the surface tension in water. How do you suppose soap affects the surface tension of water? Explain.
A slide inclined at $35^{\circ}$ takes bathers into a swimming pool. With water sprayed onto the slide to make it essentially frictionless, a bather spends only one-third as much time on the slide as when it's dry. What's the coefficient of friction on the dry slide?
Adi S.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD