video-tutor.net的 10 大竞争对手

organicchemistrytutor.com

If you’re spending hours studying organic chemistry and still not getting your A, this post is for you. Let me start with an example. Here is a fairly typical second-semester organic chemistry question: we start with benzyl alcohol and need to convert it into a carboxylic acid. The first thing I notice is that the...

masterorganicchemistry.com

In this post we go through two key strategies for answering the common exam question of whether molecules are enantiomers, diastereomers or the same.

tutorial.math.lamar.edu

welcome to my math notes site. contained in this site are the notes (free and downloadable) that i use to teach algebra, calculus (i, ii and iii) as well as differential equations at lamar university. the notes contain the usual topics that are taught in those courses as well as a few extra topics that i decided to include just because i wanted to. there are also a set of practice problems, with full solutions, to all of the classes except differential equations. in addition there is also a selection of cheat sheets available for download.

phyley.com

We will solve a problem where an object is left falling from a given height and we need to find the time it takes to hit the ground, find the impact velocity, and draw the graphs describing the motion of the object.

onlineorganicchemistrytutor.com

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iknowit.com

interactive math and ela practice site for students in kindergarten through 5th grades. review addition, subtraction, multiplication, division, fractions, telling time, counting money, geometry, spelling, grammar, phonics, reading comprehension, and much more!

freebookcentre.net

Looking for free Chemistry Books? Download free Chemistry textbooks, ebooks, and lecture notes in PDF format. Learn basics, advanced concepts, and get an introduction to the subject.