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 48 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
Gracias!


momolu

  • Member
  • Posts: 320
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

For a complete list of videos, visit our video library