Precision, Accuracy, Measurement, and Significant Figures

In this video, I define Precision and Accuracy and use examples to illustrate the differences between them. I discuss the process of using a ruler to measure length and how to add an estimated digit to the end of a measurement. Finally, I explain the rules for determining the number of significant figures in a measurement.

[alleynewman]

Learned more in a 20 minute video than a quarter of chem class. Guess whos acing her exam? Thanks!!

[alllisun]

It’s honestly kinda sad that i’m paying $400 each class on college just to teach myself with youtube videos and my professors just sitting back, doing nothing & getting paid for it…. Thanks for this video anyways.

[tb]

This is way better than Khan Academy's explanation imo.

[WeloveMykeyJ]

THIS WAS LIFE My professor is a dr. and he couldn't even explain this in a way that his class could understand it! I really appreciated the video and it completely helped me understand precision and sig figs! I even took notes to refer back to. thank you!!

[gauravgoel]

I feel like after watching this video, my whole perception regarding measurements is changed!!! We live in an absolute imperfect world. Its all about the extent we can go for precision!!! ☑

[rosietait]

THIS VIDEO TAUGHT ME MORE IN 20 MINUTES THAN MY TEACHER DID IN 5 CLASSES

[samuelhuggins]

Thank you SO much for this! I at first hesitated due to the length of the video, but having watched it I am VERY indebted. The discussion of significant numbers and measurements drove me crazy today when there were obvious inconsistencies on the material that our teacher provided. It is relatively easy to identify how many significant figures are in a number ALREADY DETERMINED, but to take a measurement yourself and determine how low one can designate the significant figures was not touched upon. I can sleep well now knowing that significant figures are all known numbers PLUS one estimated digit. WHY this wasn't in the textbooks is beyond me.

[marciacuesta]

I am a chemistry teacher and I must commend you on your accurate information, clear explanations and well presented video.

[Macabresque]

This was the explanation I needed to help wrap my brain around this concept. Thank you!!

[kaylafernandes]

THIS SAVED ME. THE PACIFIC ATLANTIC TRICK IS GENUIS. I LOVE YOU

[rajasetlur]

Excellent resource, prepared very thoughtfully and systematically! Thank you, sir!

[johnholme]

Now I understand the significance of significant figures! Pun intended! Great video! Both comprehensive and easy to understand; thank you!

[ScienceJim]

Very well done. Great illustrations and slow and steady presentation. I'm using this with my class tomorrow. Thank you for your time to create this.

[debraj.]

this video is amazingly creative with the metaphor of Pacific and Atlantic. Thanks a lot.

[taff_]

Excellent explanation. Worth watching.

[vincentt.]

Sir your measuring object section was amazing I had a question on this exact topic but didn’t practice this beforehand

[anniesimrin]

first class teaching fascinating ideas

tnq sir

[charlottefu]

You explained really clear and you are an excellent teacher. Big thank you for saving my life!!!!

[bobbleheadeater]

I guess that 007 agent was really just agent 7 all along.

James Bond has lied to us all.

[tega_ovi]

I really enjoyed this video and understood every concept. Thanks 😊😊