Your intro music is going on inside my mind the whole day.

thanks

Thank you for these wonderful lectures. I enjoy hiking and I am using this information to help me understanding nature better. Where are you teaching now?

@MelStrong

4 жыл бұрын

Thanks and I'm glad that you find them useful. I've now moved into the world of informal education at a science museum....my previous university decided to cut my program so that forced a move on my part.

@charlesforsythe128

4 жыл бұрын

@@MelStrong I read some of the articles and was disappointed (not a strong enough emotion to describe my true feeling) that the program was cut. I am in medical school and would like to teach undergraduate anatomy and physiology one day in a way that demonstrates concepts like you have done in these videos. I will always be an advocate for all science disciplines because there are so many fascinating concepts to be shared with the world in all science disciplines. Thank you again for your work, I am a watching one lecture a night. Onto lecture 7...

@MelStrong

4 жыл бұрын

Wow thanks...I would imagine that anyone in medical school has plenty on their plate already so I don't know how you can find the time to watch even more lectures LOL....from what I have heard the world of anatomy and physiology is one with intense memorization....so I don't know how you could approach that subject to make it more interesting without getting lost in all of the terminology. In earth sciences we are lucky in that there are some big ideas that we can talk about without a lot of scary vocabulary!

@charlesforsythe128

4 жыл бұрын

@@MelStrong Yes anatomy and physiology has a lot of interesting terminology but it is actually manageable when you know the etymology of the words. Truly, the answers are within the words themselves. That is why I want to teach, because if people know the etymology/translation then the subject matter becomes less abstract and actually quite interesting. There is memorization initially until you spend enough time to recognize that the body is truly interrelated. The body has a finite amount of specific molecules given how ancient it is, and since the body is so ancient these molecules travel around the body and perform multiple tasks, which truly goes to show how interrelated our body's function is. This is also what makes medicine difficult because when a problem occurs, you have to look at how that problem and your solution interact with the rest of the body. And unfortunately, this is also what causes medicines to have side effects in our time but science will continue to master how medicines can act specifically at the point of interest and no where else.

@hellkell8693

3 жыл бұрын

@@MelStrong that’s a terrible loss for that school. Hope you are doing well these days.

How come that if we add more water to the air dew point goes up? If dew point is the temperature at which air is saturated, but it keeps increasing with the addition of more water, then surely it would never reach saturated point?

@MelStrong

3 жыл бұрын

Imagine we have a little box of air that contains 100 water molecules in the vapor state. Let's say due to the size of our box and other factors, that the dew point in this case is 50F (I'm just making these numbers up to create a scenario). That means that at 50F, we are at our absolute limit for water molecules in the vapor state - in this case exactly 100. If I raise the temperature to 60F, I could have more than 100 water molecules in my box. If I lower the temperature below 50F, I have too many water molecules in the vapor state, and some will have to condensate out. OK now imagine I raise the temperature of this box to 80F, still sealed with the same 100 water molecules inside. The dew point has not changed - I still need to lower it to 50F for condensation to occur. But now, while at 80F, I add 30 more water molecules to the box for a total of 130. When I cool the box down, condensation will occur at some temperature *higher* than 50F. The extra water molecules in the box means that we will hit that condensation point at a warmer temperature than before. If you imagine cooling this box down from 90F to 50F, we would notice that condensation occurs sooner - maybe at 55F or 60F. Hence we have raised the dew point by adding water vapor. In this roundabout way, dew point is a measure of how much water is in the air; the higher the dew point, the more water vapor is in the air.

Okay so I took the test but I was really confused, number 5a. how did you get the mixing ratio?