Hi, I just wanted to thank you for making these videos. I've always struggled with physics, but these videos are far easier to comprehend than anything I've done before. I am using these to self-teach physics to hopefully write the MCAT. Thanks again, from Canada.
I have a couple of answers to your question. 1) Absolutely. It is one of the rounding rules. You always round to the even number when the number ends in a perfect five. 2) I doubt the CollegeBoard would really have a point depend on this rule. I mean really 1 out of 15 points on a Free Response Question or 1 out of 35 points on the Multiple Choice? Doesn't make sense to me that they would score it that way. The AP Physics Test is a Physics test and your question doesn't really have to do with physics. We will most likely never know which answer is correct though, so just remember and use the rule correctly. Thanks for the question, I don't believe I have ever been asked this one before.
MR.P any idea about As physics rules.I am little confused with uncertainty and significant figures. Can you do a video on it and more practice on significant figures
I'm confused. So you don't use significant figures as you go along in physics? You only use them to round the final answer? What if the problem requires you to use both addition and multiplication? That is two different rules. How do you pick which one to use to round your final answer? Is it the just the least amount of significant figures in the given numbers?
@@najeyrifai1134 I think what you are missing is that: when 5 is the last digit to be dropped (245 to 2 sig. fig. is 240), then you apply this special rule. So perhaps the examples you have been exposed to in the Uk is when 5 isn't the last digit to be dropped (2452 to 2 sig. fig. is 2500).
I call it the "Arcane Rounding Rule" When a number ends in a perfect 5, round to the even number. 26.5 rounds to 26, because 6 is even. 275 rounds to 280, because 8 is even. "Ends in a perfect 5" means there are no digits after the 5. Hope that helps!
Its very nice that Bo and Bobby stopped misbehaving after this incident. Nice video as always!
Wow I'm pretty sure that video chapters weren't a youtube feature in 2013. So this man added them retrospectively, bravo.
Nice catch!
Thanks for clarifying about rounding off perfect 5 (Arcane rounding rule)...👏
Hi, I just wanted to thank you for making these videos. I've always struggled with physics, but these videos are far easier to comprehend than anything I've done before. I am using these to self-teach physics to hopefully write the MCAT. Thanks again, from Canada.
Glad you found my videos. Best of luck on the MCAT!
Thanks for your efforts...I showed this to my Pre AP Physics class today
Awesome! Glad to help your students learn.
These videos make me very uncomfortable, but this guy is the only one who makes sense...
The new knowledge is accumulating in my mind. thank you Mr. P!
Keep on learning my friend!
Hi, Your vids are fantastic. Love the four yous. Thanks so much! Looking forward to more.
This explained most of my questions. thank you
We enjoy learning by you . Thank you very much sir.
I see you have been learning a lot from me. Makes me happy.
Thank you from s.korea
You are welcome. From the USA.
Any chance you could help me out by doing what I ask people to do in this video? bit.ly/2y4tOCA It would be a great way to show your appreciation!
Thank you 🤓🤩
I've never heard of this perfect 5 rounding, is that actually applied when they evaluate AP physics tests?
I have a couple of answers to your question.
1) Absolutely. It is one of the rounding rules. You always round to the even number when the number ends in a perfect five.
2) I doubt the CollegeBoard would really have a point depend on this rule. I mean really 1 out of 15 points on a Free Response Question or 1 out of 35 points on the Multiple Choice? Doesn't make sense to me that they would score it that way. The AP Physics Test is a Physics test and your question doesn't really have to do with physics.
We will most likely never know which answer is correct though, so just remember and use the rule correctly. Thanks for the question, I don't believe I have ever been asked this one before.
MR.P any idea about As physics rules.I am little confused with uncertainty and significant figures. Can you do a video on it and more practice on significant figures
I'm confused. So you don't use significant figures as you go along in physics? You only use them to round the final answer? What if the problem requires you to use both addition and multiplication? That is two different rules. How do you pick which one to use to round your final answer? Is it the just the least amount of significant figures in the given numbers?
good video for practice
Is the perfect 5 rounding rule also used in AP Calculus or other math based AP exams?? Or is it just for AP Physics??
It’s a rounding rule and should be used in all math classes.
Also please do a video on drawing line of best fit pkease
How do you round intermediary values multiplied by some irrational/long decimal constant, like sin(50deg) or 0.539402184... ?
You never round intermediary values. Carry the full amount of digits that your calculator can carry, and wait until the very end to round.
When I first learned rounding, I was thought that if it was 5 then I could do whatever I wanted. Guess that was wrong lol 6:32
What do you mean by using the lecture notes responsibly?
I think it's a joke
The exam boards in the UK say to have one more sig fig than the least number.
Interesting. Can anyone else corroborate this statement?
Flipping Physics They also ignore the rule with 5 and just say round up.
Najey Rifai 😞
@@najeyrifai1134 I think what you are missing is that: when 5 is the last digit to be dropped (245 to 2 sig. fig. is 240), then you apply this special rule. So perhaps the examples you have been exposed to in the Uk is when 5 isn't the last digit to be dropped (2452 to 2 sig. fig. is 2500).
it is weird that all students have the same socks
how does 26.5 round down but 275 round up? I'm super confused.
I call it the "Arcane Rounding Rule"
When a number ends in a perfect 5, round to the even number.
26.5 rounds to 26, because 6 is even.
275 rounds to 280, because 8 is even.
"Ends in a perfect 5" means there are no digits after the 5.
Hope that helps!
makes sense thank you so much !!
Hi, For 26.5, I got 27 in Omni calc for 2 significant digits.
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