This is a short video on how to step through a dimensional analysis problem.
Пікірлер: 13
@HelpMeWithSchool151511 ай бұрын
I liked how you showed where to start in a problem like this. I never understood how to start.
@docireland11 ай бұрын
I'm glad it helps. Dimensional analysis can be tricky when applied to more complex problems.
@quantumman2145 Жыл бұрын
Thanks John, for being the dimensional analysis savior we needed
@tessabright81052 жыл бұрын
THANK YOU! Great explanation, you helped me finally make sense of these types of problems.
@docireland2 жыл бұрын
Great to hear!
@speedbird31573 ай бұрын
Great stuff! Liked how you worked through this problem
@josiahhood7000 Жыл бұрын
best video on this ever life changer for real
@bellam1969 Жыл бұрын
This was amazing; thank you so much!
@thejaeger_11 ай бұрын
I have 2 questions. How do you know whether you get the sig figs from the problem or the conversion factors? Cus u said 3 sig figs in the answer but wouldn’t it only be 1, because of the 1000g seeds? My second question is 270 isn’t 3 sig figs it’s only 2. Thank you!
@docireland11 ай бұрын
First answer, your conversion factors are bounded by your problem data. For example, if your conversion factor was 12.3456 widgets per 1 wangdoodle, but the data in the problem data only has two significant figures, you could use 12.3 without affecting the final answer. I would always caution to use one more digit in this way, so as not to introduce rounding errors. Second, the conversion of 1 kg of seeds to 1000g seeds is exact, as are all metric conversions, and therefore do not affect significance. Finally, the final answer to three significant figures is 270, but you could make the zero explicitly significant by either writing it in scientific notation (2.70 × 10^2) or writing it as 270. to make it clearer.
@thejaeger_11 ай бұрын
@@docirelandThank you!
@majdmahdi7016 Жыл бұрын
would we need to memorize the conversion factor?
@docireland Жыл бұрын
In a chemistry class, basic conversions between SI/metric units are required knowledge.