This topic contains a solution. Click here to go to the answer

Author Question: Why is perspiration an effective means of cooling human skin? What will be an ideal ... (Read 50 times)

sammy

  • Hero Member
  • *****
  • Posts: 818
Why is perspiration an effective means of cooling human skin?
  What will be an ideal response?

Question 2

Explain why the dew point temperature provides a better indication of the actual amount of water vapor in the air than relative humidity.
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

apple

  • Sr. Member
  • ****
  • Posts: 352
Answer to Question 1

ANSWER: An appropriate answer would be that evaporation is a cooling process, so when the air temperature is high and the relative humidity low, perspiration on the skin evaporates quickly, often making us feel that the air temperature is lower than it really is. However, when both the air temperature and relative humidity are high and the air is nearly saturated with water vapor, body moisture does not readily evaporate; instead, it collects on the skin as beads of perspiration. Less evaporation means less cooling, so we usually feel warmer than we did with a similar air temperature, but a lower relative humidity.

Answer to Question 2

ANSWER: Students need to demonstrate knowledge that the relative humidity does not represent the amount of water vapor in the air, but rather how close the air is to being saturated, which is why it is not a good indicator of humidity. In contrast, the dew point is a measure of the amount of water vapor in the air. High dew points indicate high water vapor content; low dew points, low water vapor content. The addition of water vapor to the air increases the dew point; removing water vapor lowers it.




sammy

  • Member
  • Posts: 818
Reply 2 on: Jul 13, 2018
Excellent


kishoreddi

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

For a complete list of videos, visit our video library