freelanceteach
Loading...
15,946
subscribers
11,128,133
video views
Featured Playlists
Kinematics: one-dimensional motion
Physics: How to solve kinematics problems about one-dimensional motion with constant acceleration.
I offer tutoring via Skype. For more information, go to my website:
http://www.freelance-teacher.c<wbr>om
These videos are offered on a "pay what you like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.c<wbr>om/videos.htm
(1) Intro
(2) Always write down the sign, not only for negative numbers, but also for positive numbers. The kinematics variables and their units
(3) The kinematics variables for the x-component and the y-component
(4) The kinematics equations for the x-component
(5) The missing variables. The kinematics equations for the y-component
(6) The systematic, five-step method for solving kinematics problems
(7) An example, illustrating how to use the systematic five-step method
(8) The example concluded
(9) Another example
(10) The example concluded
(11) Another example
(12) The relationship between velocity and acceleration. Velocity tells you which way you're going. Acceleration does NOT tell you which way you're going; in one dimension, acceleration tells you whether you're speeding up or slowing down
(13) The relationship between velocity and acceleration, continued. When the acceleration is parallel to the velocity, you're speeding up; when the acceleration in antiparallel to the velocity, you're slowing down. "Slowing down" does not mean "negative acceleration"
(14) Don't compare the length of the acceleration vector with the length of the velocity vector. If an object is accelerating to the left, it may or may not be moving left right now; but if it continues to accelerate to the left for long enough, eventually it will indeed be moving left
(15) Summary of the relationship between velocity and acceleration. Don't use the word "deceleration"
(16) An example
(17) The example continued
(18) The example concluded. Constant-acceleration kinematics displays symmetry--if two points on the path have the same displacement, then the object has the same speed at both points
(19) Another example
(20) In the instant that you reverse direction, your velocity is zero
(21) An example
(22) The example concluded
(23) Two more examples
(24) Another example
(25) The example concluded
(26) Another example
(27) The example concluded
(28) "Zero acceleration" means "constant velocity"; in one dimension, "zero acceleration" means "constant speed"
(29) How to solve kinematics problems with constant velocity (zero acceleration)
(30) Constant velocity kinematics, continued
(31) Constant velocity vs. constant acceleration
(32) An example, involving constant velocity and multiple objects
(33) The example continued
(34) The example concluded
34 videos
Play all(34)
34 videos
Play all(34)
Organic chemistry: Introduction to Grignard reagents
Organic chemistry: Reaction of Grignard reagents as bases with protic solvents. Reaction of Grignards as nucleophiles with aldehydes and ketones. Introduction to synthesis with Grignards.
This is a recording of a tutoring session, posted with the students' permission.
These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.c<wbr>om/videos.htm
I offer tutoring via Skype. For more information, go to my website.
For the printable "handouts" discussed in these videos, go to my website.
(1) How to draw Grignards
(2) Continued. Grignards as a source of nucleophilic carbon
(3) Reactions of Grignards as base
(4) Continued
(5) Carbonyl-containing functional groups. Reaction of Grignards with aldehydes and ketones
(6) Continued
(7) Continued
(8) Continued
(9) How to make Grignards
(10) Introduction to synthesis. Synthesis with Grignards. Retrosynthesis
(11) Continued
(12) Continued
12 videos
Play all(12)
12 videos
Play all(12)
Organic chemistry: How to draw resonance structures
Organic chemistry: How to use curved ("electron-pushing") arrows to draw resonance structures.
These videos are offered on a "pay what you like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.c<wbr>om/videos.htm
(1) Intro
(2) Intro: The meaning of resonance
(3) Intro: legal vs. illegal structures; the purpose of drawing resonance structures is to identify where the charges are
(4) Intro: more significant vs. less significant structures
(5) Intro: "more significant", "less significant", "insignificant"
(6) Intro: Why is it so important to know where the charges are?
(7) Intro: Why is it important to know where the charges are, continued.
(8) How to draw resonance structures when you are given a single electron-pushing arrow: lone pair to pi bond
(9) Lone pair to pi bond, continued
(10) Lone pair to pi bond, continued
(11) How to draw resonance structures when you are given a single electron-pushing arrow: pi bond to lone pair
(12) Pi bond to lone pair, continued
(13) How to draw resonance structures when you are given a single electron-pushing arrow: pi bond to pi bond
(14) Pi bond to pi bond, continued
(15) Summary and review
(16) How to draw resonance structures when you are given two electron-pushing arrows
(17) Given two electron-pushing arrows, continued
(18) Given two electron-pushing arrows
(19) Given two electron-pushing arrows
(20) Given two electron-pushing arrows
(21) Summary and review
(22) How to draw resonance structures when you are given multiple electron-pushing arrows
(23) Given multiple electron-pushing arrows, continued
(24) Given multiple electron-pushing arrows, continued
(25) Given multiple electron-pushing arrows, continued
(26) Given multiple electron-pushing arrows, continued
(27) Given multiple electron-pushing arrows--cycles of arrows
(28) Given multiple electron-pushing arrows--cycles of arrows
(29) How to draw resonance structures when you're given electron-pushing arrows--triple bonds
(30) How to identify atoms which are candidates for resonance
(31) Candidates for resonance, continued
(32) Using "candidates for resonance" to detect illegal arrows
(33) Candidates for resonance: elements that can exceed an octet
(34) "Owning", "sharing", and "lacking" electron pairs
(35) Don't draw "lone pair to lone pair" transitions
(36) The "as close as possible" principle
(37) The "as close as possible" principle
(38) The "as close as possible" principle
(39) Don't break sigma bonds!
(40) Don't exceed an octet. But you don't need to worry that "pi bond to lone pair" transitions will exceed an octet.
(41) The most important rule: To avoid exceeding an octet, any new pi bond must be formed either with a carbocation, or with an atom that's also losing a pi bond.
(42) The most important rule, continued
(43) The most important rule, continued
(44) The most important rule, continued
(45) The most important rule, continued
(46) The most important rule: summary and review; elements in 3rd period and below
(47) Don't draw resonance structures with more than two charges
(48) Don't draw resonance structures with more than two charges, continued
(49) The two good reasons for moving a pi bond into a lone pair
(50) The two good reasons for moving a pi bond into a lone pair, continued
50 videos
Play all(50)
50 videos
Play all(50)
Organic chemistry: Aldehydes, ketones, enolates
Organic chemistry: Nucleophilic attack on aldehydes and ketones; acetals and ketals. Enolates. Ylides; Wittig reaction. Mechanism problems.
This is a recording of a tutoring session, posted with the students' permission.
These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.c<wbr>om/videos.htm
I offer tutoring via Skype. For more information, go to my website.
15 videos
Play all(15)
15 videos
Play all(15)
Organic chemistry: Aromatic, antiaromatic, and Huckel's Rule
Organic chemistry: How to use Huckel's Rule to determine whether a molecule is aromatic, antiaromatic, or nonaromatic.
These videos are offered on a "pay what you like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.c<wbr>om/videos.htm
These videos are designed to help students who are finding the material difficult, so I go very slowly, with lots of repetition and examples. If you don't find this material difficult, you might be very bored by these videos and might prefer to learn straight from a textbook.
(1) The rule for determining hybridization
(2) The rule for determining hybridization, concluded
(3) The exception to the rule for determining hybridization
(4) What are the valence orbitals of hybridized atoms?
(5) "Flat", "cyclic", "completely conjugated"
(6) Counting pi electrons
(7) Counting pi electrons--harder problems
(8) Counting pi electrons--more problems
(9) Counting pi electrons--more problems
(10) Counting pi electrons--more problems
(11) Counting pi electrons--even more problems
(12) Counting pi electrons--rings with substituents
(13) Counting pi electrons--polycyclics
(14) Counting pi electrons--radicals; and a puzzle
(15) Counting pi electrons--triple bonds
(16) The lesson from triple bonds
(17) A deeper look: why do the rules work?
(18) A deeper look, continued
(19) A deeper look: Why is there an "exception to the rule" for hybridization?
(20) A deeper look: Why "flat"?
(21) A deeper look: Why "4n+2"? Molecular orbitals
(22) Why "4n+2"? Frost diagrams
(23) Why "4n+2"?
(24) Why "4n+2"?
(25) Why "4n+2"?
25 videos
Play all(25)
25 videos
Play all(25)
Advertisement
About freelanceteach
These videos are offered on a "pay what you like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.com/videos.htm
At my website you can find links to playlists for all the video series, with series on similar topics arranged in suggested viewing order, as well as printable documents containing the "handouts" or problems discussed in the videos.
I am not an expert on the topics covered in these videos. The videos may contain errors; viewer beware.
less
These videos are offered on a "pay what you like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.com/videos.htm
At my website you can find links to playlists for all the video series, with series on si...
more
more
less