Validity, reliability and accuracy explained

What doe validity, reliability and accuracy mean in experiments?
Watch and find out.
Support me on Patreon - / highschoolphysicsexpla...
Find me on facebook - HighSchoolPhysicsExplained
credit Pendulum animation -
PhET Interactive Simulations
University of Colorado Boulder
phet.colorado.edu

[@trystanmadfouni8329]

this was a very good resource for an upcoming timed investiagation in class, hopefully I'll be back to comment how it went. definitely helpful either way 👍

[@zizobriencavanough721]

Perfect timing cause I have my HSC physics exam tomorrow

[@PhysicsHigh]

Best of luck tomorrow.

[@audi8286]

So how’d it go?

[@nitupervin558]

is it hard, cause i want to do physics for yr12. Also how well does it scale?

[@PhysicsHigh]

It is challenging but if you enjoy physics then go for it. I advise that you are doing mathematics (not standard maths) and you should be a minimum B for science. It does scale well but don’t choose it for that reason. Biology and chemistry all scale similarly.

[@zizobriencavanough721]

Well I just got a a notification on this old comment. Ahh, I think it went pretty good when I did it. If you listen in class and pay attention it should go fine. But yeah, only do it if you actually enjoy that side of science. I'm older now, and at then end of the day it doesn't really matter what you do. Just do it if enjoy it, and continue to do further study through your life, it's good for ya.

[@zapper2994]

👍Thanks bro

[@lewisrt101]

I hope someone can help. How do I measure or calculate reliability and validity with a sample size of 27? I cannot do Cronbach Alpha as you need a bigger sample size for that.

[@wissejong]

But with the second example, about counting the time yourself or with a stopwatch. Is that the accuracy? Accuracy: How close the measured value is to the true value?

[@sebbydaking1014]

thanks for this

[@PhysicsHigh]

You’re welcome.

[@MrHendude1]

My understanding, and I could be wrong, is that no matter the angle of the pendulum the period is the same. However using large angles creates higher velocities and more air resistance.

[@PhysicsHigh]

Actually, air resistance isn't the issue (though in real life of course it plays a part depending on the mass and surface area of the pendulum bob). The mathematics involves an understanding of rotational dynamics, specifically Newton's 2nd law for rotational systems. The formula I have is an approximation for the period and only works when sin (θ) ≈ θ. Check out this link for an explanation www.acs.psu.edu/drussell/Demos/Pendulum/Pendula.html

[@MrHendude1]

High School Physics Explained okay thanks :)

[@milolove1809]

ummm im thinking this video is gonna explain how accurate the ~ pendulum ~ is for yes /no questions 0.0

[@wricho257]

My name jeff

[@smurferbro3058]

W Richo William Richardson how dare you comment on this post I will be telling your teacher in 8.6