Thanks John, for being the dimensional analysis savior we needed

I liked how you showed where to start in a problem like this. I never understood how to start.

@docireland

10 ай бұрын

I'm glad it helps. Dimensional analysis can be tricky when applied to more complex problems.

Great stuff! Liked how you worked through this problem

THANK YOU! Great explanation, you helped me finally make sense of these types of problems.

@docireland

2 жыл бұрын

Great to hear!

best video on this ever life changer for real

This was amazing; thank you so much!

would we need to memorize the conversion factor?

@docireland

10 ай бұрын

In a chemistry class, basic conversions between SI/metric units are required knowledge.

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!

@docireland

10 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_

10 ай бұрын

@@docirelandThank you!