Thank you for these videos! I am a slide rule collector and enthusiast, but I haven’t used a rule professionally or “in anger”😂. Your videos, and Professor Herning’s, provide a lot of insight to help us get past “2 x 2 = 4” operations!
Nifty as always. You should get GLink or similar so that you can draw over & highlight anything on your screen as you're talking about it. It would let us not need to pause as often. Like especially to show what line/row/scale in the crosshairs that you're currently referring to & such.
Found your channel this morning and have thoroughly enjoyed watching the video. I had not used slide rule since 1973. HP introduced their first scientific calculators that year, just as I entered engineering school! Now I’m going to find that old Pickett and see if I can still use it.
At 12:33 the 3 on the D Scale aligned with the 2 on the Ci Scale. The cursor could be moved further to the left until the 2 on the D Scale aligned with the 3 on the Ci Scale. Is this an equally valid solution? If not, why not. Great video.
That is a GREAT pick up. Think about why that is.... We were looking at factors of 6. The square root of 6 is about 2.449. The scales reverse at that point, so it is 3/2 to the right of the root and 2/3 to the left. Based on the numbers you are looking for, it may be easier to see the scale on one side or the other. But as you point out, it matters not which you use.
Eggcellent! I have the same Pickett and my ultimate, Faber-Castell 2/83N Novo Duplex. I keep a 6" Pickett on my desk. I never knew about the factoring trick!
Strictly speaking, you have found the factors of the quadratic expression which is not the same as "solving the equation" - but I'm a pedant. Also, I've never solved square roots by your method - I've always just used the A/B and C/D scales directly.
Very true the actual roots come from solving the linear equations once you have the factors. (X-3) is a factor, solving for X means x=3, which is the actual root. Yes, the A/B and K scales are covered in the basic series and are the way to go. I was using it to demonstrate the techniques I used later in the quadratic equation video. I'm sure you see how understanding what I was doing with square roots made the quadratics easier to follow- that was the purpose.
You beat me on this. In the end we need to reverse the signs of the factors we found. That's what I really learned to appreciate about the slide rule as a didactic tool: It trains you to constantly think about what you are doing and looking for ways to reconfirm your results.
Thank you for these videos! I am a slide rule collector and enthusiast, but I haven’t used a rule professionally or “in anger”😂. Your videos, and Professor Herning’s, provide a lot of insight to help us get past “2 x 2 = 4” operations!
Yes I enjoy his video and learned from them as well
I did my first solution of a quadratic equation with a slide rule last evening. What a great way to do it. Awesome!
That's a good way to make math more fun.
Nifty as always. You should get GLink or similar so that you can draw over & highlight anything on your screen as you're talking about it. It would let us not need to pause as often. Like especially to show what line/row/scale in the crosshairs that you're currently referring to & such.
I'll look into it
thanks for the suggestion
Found your channel this morning and have thoroughly enjoyed watching the video. I had not used slide rule since 1973. HP introduced their first scientific calculators that year, just as I entered engineering school! Now I’m going to find that old Pickett and see if I can still use it.
Awesome! Thank you! There is a link to a virtual slide rule in the description
At 12:33 the 3 on the D Scale aligned with the 2 on the Ci Scale. The cursor could be moved further to the left until the 2 on the D Scale aligned with the 3 on the Ci Scale. Is this an equally valid solution? If not, why not. Great video.
That is a GREAT pick up. Think about why that is.... We were looking at factors of 6. The square root of 6 is about 2.449. The scales reverse at that point, so it is 3/2 to the right of the root and 2/3 to the left. Based on the numbers you are looking for, it may be easier to see the scale on one side or the other. But as you point out, it matters not which you use.
Great explanation!!!
thanks, it was fun to research this.
Great 😲
You never cease to amaze me!
Thank you! Cheers!
You are amazing, big explanation and math knowledge.
Glad you think so!
Eggcellent! I have the same Pickett and my ultimate, Faber-Castell 2/83N Novo Duplex. I keep a 6" Pickett on my desk. I never knew about the factoring trick!
Pretty epic isn’t it?
The n3 and the aristo studio 0968 are my main slides. I have a 2/83 for the desk but it and the 20 in are too big to carry around
i'm honestly (seriously honestly) surprised you haven't been inundated with logarithm-denying flerfs by now.
lol. Guess because they think math is fake, they aren't bothering.
Hanks you so much. This is perfect. Thanks!!!
Thanks. I'm currently learning quadratic equations and projectile motion problems in physics. I was wondering how I could use my slide rule for those.
Just like that. I also put out a video on quadratics today you might like
Wow! That's really awesome.
Strictly speaking, you have found the factors of the quadratic expression which is not the same as "solving the equation" - but I'm a pedant.
Also, I've never solved square roots by your method - I've always just used the A/B and C/D scales directly.
Very true the actual roots come from solving the linear equations once you have the factors. (X-3) is a factor, solving for X means x=3, which is the actual root.
Yes, the A/B and K scales are covered in the basic series and are the way to go. I was using it to demonstrate the techniques I used later in the quadratic equation video. I'm sure you see how understanding what I was doing with square roots made the quadratics easier to follow- that was the purpose.
You beat me on this. In the end we need to reverse the signs of the factors we found.
That's what I really learned to appreciate about the slide rule as a didactic tool:
It trains you to constantly think about what you are doing and looking for ways to reconfirm your results.
I was unable to follow you at 4:00 because there are simply too many scales to look at. You need to highlight which scales you're looking at.
Sorry about that. We are using c d and ci
@@sliderulesandmathematics9232 Happened to me, when I tried to do some practice problems.
The conditioning to only look at C and D is strong... 😅