Alejandro, In the example you give you have a two scalars, the numbers 50.5 and 15, and two sets of units, the cm^3 and the cm^2. In this case you've got no big problems, because numbers divide into numbers and c^3/cm^2 is simply cm (or cm^1 if you like). So you've divided a volumve, 50.5 cm^3 by an area, the 15 cm^2, and naturally you ge a distance, 3.36666... cm. If you think of this in physical terms, a volume divided by an area might be a question about "how high is a tower of something if you know the area of the base?" Best, -dlj.
Khan Academy In a division problem or any kind of problem can I for instance directly dived 50.50cm^3 by 15.0cm^2 or would i have to convert one in order to do this problem
One is never to old to relearn. I seem to be more fascinated at 56 then I was at 19 as a college student. You do a great job teaching I sure hope that is your profession.
A base (Acid-Base chemistry) is a proton ACCEPTOR, with a lone pair, the nitrogen can accept protons (H-plus) hence, in acid-base chemistry, it indeed is a base... :)
I'm very confused: 1. In the glucose I noticed that the first and third carbon (consider from left to right) lack hydrogen. Is there an explanation for that? 2. In the amino acid, for the carboxyl group I didn't get how the oxygen being electronegative would want to get rid of the hydrogen; even if that's the case, would the oxygen form a double bond with the carbon? How can the carbon sustain more than its capacity? 3. Same question about the amino group
I've been looking everywhere for visual explanation of the functional groups, and no one does it better than you Sal! Thank you so much!
Actually
You forgot to mention the sub groups in carbonyl (aldehyde and ketone)
Mr Khan literally teaching the world
I love you
life saver. got a bio midterm tomorrow
do you remember how you did?
I'm just starting out learning bio this in depth and man is it tricky to understand. Glad to have this great instruction
Can someone explain me carbonyl group
R means rest of the molecule.
You are amazing. I always find myself fascinated by your educating ways.
My AP bio teacher gave this to us to watch and take notes on, and you made it so much easier to understand. Thank you so much!
literally was freaking out about a pop quiz on this, life saver
Now I see how peptide bonds can form. Excellent!
This guy ,this buziness,..are not compatible with a terse academic language.Brilliant but confusing
These videos are incredibly informative for me. For whatever reason the textbook would never be enough. Props to Khan Academy
The beauty of visual reception when backed with auditory reception
this really helps me as a college student! i felt totally lost in my biology class haha khan academy has always been a real one
Alejandro,
In the example you give you have a two scalars, the numbers 50.5 and 15, and two sets of units, the cm^3 and the cm^2.
In this case you've got no big problems, because numbers divide into numbers and c^3/cm^2 is simply cm (or cm^1 if you like). So you've divided a volumve, 50.5 cm^3 by an area, the 15 cm^2, and naturally you ge a distance, 3.36666... cm.
If you think of this in physical terms, a volume divided by an area might be a question about "how high is a tower of something if you know the area of the base?"
Best,
-dlj.
thank you alejandro
Khan Academy In a division problem or any kind of problem can I for instance directly dived 50.50cm^3 by 15.0cm^2 or would i have to convert one in order to do this problem
Thank you! This helped a lot!
Yo Sal! You da best! I wish you were my teacher! Keep up the good work!
How are you'll sooooo goodddd!!!🤯🤯
usefullllll
yo W khan academy
Thank you so much! I’m back in college taking a biology class. I was getting ready to cry trying to study for the exam. Finally it clicks!
OPOPOPOPOPOP
Is it possible for a molecule to have 3 carbonyl groups at the same time?
One is never to old to relearn. I seem to be more fascinated at 56 then I was at 19 as a college student. You do a great job teaching I sure hope that is your profession.
When TH-cam is doing a better job than going for lectures
Why is all of this in a class 10 book I'm studying?????
thanks
what does the weird "s" thing mean when he points out how one end is electronegative and the other is positive?
Delta
Subscribed after just watching first min
Helped me out a lot!!
Clear and easy to understand
Why is this video uploaded twice?
because it's that good
voice??
u said amino 'acid' and then u said that its a base???
It's a base so he said it's base xD
Amino group Actually IS a base. He's not wrong.
A base (Acid-Base chemistry) is a proton ACCEPTOR, with a lone pair, the nitrogen can accept protons (H-plus) hence, in acid-base chemistry, it indeed is a base... :)
you pronounced carbonyl wrong
Thank you sir!!!!
best video
Thanks Sal.
Thank you Lord Khan
THANK YOU
how can both of them be carboxyl group
this was great!
very helpful
Outstanding
Too much on the board to follow, sorry
Thank you ^_^
I'm very confused:
1. In the glucose I noticed that the first and third carbon (consider from left to right) lack hydrogen. Is there an explanation for that?
2. In the amino acid, for the carboxyl group I didn't get how the oxygen being electronegative would want to get rid of the hydrogen; even if that's the case, would the oxygen form a double bond with the carbon? How can the carbon sustain more than its capacity?
3. Same question about the amino group
Taking Biology1107K this semester, have a test next week and I’m studying. Thank you for this!
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