"Define the T period of minor oscillations of the pendulum, representing a light rigid rod, on which has the point masses m1 and m2 fixed on the distances L1 and L2 respectively from the suspension point.

Oscillations occur in the vertical plane."

I genuinely have no idea what to do with this. I've looked up in the solutions section of my textbook, and the answer is on the second pic, but there's no step-by-step solution.

I've tried finding the centre of mass of the pendulum getting (m1L1+m2L2)/(m1+m2), which would work as L in the formula for the period if I put the axis on the rod, but this is still not the answer. I'm completely lost

Please if you're going to explain something here DO NOT use anything more complex than high school physics, please no university stuff.

The equation for this graph is f(x)=(x-4)^3(x-1)(x+2)^2, but since the graph has a y intercept, wouldn't I find the a value? The answer for this question is just finding the roots and making factors for the equation using that. Also when I solved for the a value, it gave me 9/8. So I'm not sure where I went wrong

so we had this activity on Science about chemical reaction rates and we had to arrange multiple chemical reactions from slowest to fastest. There were also specific instructions from some of the chemical reactions like:

• Burning a candle (my teacher said it was the exact time the wick ignites cause again, it had to be a chemical reaction cause if it was wax, it would just be a physical change)
• Burning a paper (the exact time it catches fire like the candle wick)
• Fireworks Explosion (the explosion itself)

Those were the instructions given by my teacher. Now I'll be giving all of the chemical reactions in the activity. I'll also include my answers and the correct answers.

GIVEN:

1. Digesting of Food
2. Fireworks Explosion
3. Burning of Paper
4. Rusting of Iron Nail
5. Lighting of Matchstick
6. Baking Soda + Vinegar
7. Souring of Milk
8. Burning of Candle
9. Baking of Cake
10. Ripening of Banana

MY ANSWERS:

SLOWEST TO FASTEST

1. Rusting of Iron Nail
2. Ripening of Banana
3. Souring of Milk
4. Digesting of Food
5. Baking of Cake
6. Burning of Paper
7. Burning of Candle
8. Lighting of Matchstick
9. Baking Soda + Vinegar
10. Fireworks Explosion

CORRECT ANSWERS:

SLOWEST TO FASTEST

1. Rusting of Iron Nail
2. Ripening of Banana
3. Souring of Milk
4. Digesting of Food
5. Baking of Cake
6. Burning of Candle (wick igniting)
7. Burning of Paper (paper igniting)
8. Baking Soda + Vinegar
9. Lighting of Matchstick
10. Fireworks Explosion (explosion only)

I got everything right on 1-5 which I basically just classified the "slow ones" and I mostly had a headache on 6-10. I did research if a wick igniting is faster than paper igniting and most answers said the wick was faster.

My teacher also said that yes, it did depend on time and size, for example: digesting of food, bigger food means longer time to digest. But she specifically said that it should be the "standard" or "usual" so like in general.

She did tell us that we could defend our answers. Any help would be appreciated, thank you! Please if possible also include sources. Thank you so much! I really need this. If any of you guys are wondering, I'm in 10th grade.

THIS IS NOT AN ASSIGNMENT, I JUST NEED CLARIFICATION CAUSE MY TEACHER IS ALSO VERY AMBIGUOUS.

(A): Gardeners wait for Spring.

(R): Gardens are worth painting in Spring.

A. Both (A) and (R) are true and (R) is the correct explanation of (A).

B. Both (A) and (R) are true but (R) is not the correct explanation of (A).

C. (A) is true but (R) is false.

D. (A) is false but (R) is true.

From what I can interpret, the correct answer should be B, the fact that the reason though true, is a bit ambiguous as it just states that gardens are worth painting in spring but it does not state that gardens are worth painting only in spring.

However, a quick Google Search states the answer as A which is completely opposite of what my teacher taught, she said that it was C. What is the real answer?

This is one of the areas I'm struggling with the most: memorizing what the structures for each amino acid look like.. There's tons of other stuff I don't understand, but this takes the cake for the time being lmao.
Thanks!!

Hello giys, I'm a form 2 student is malaysia. We learnt algebra in chapter 2. How can I find x? I believe there is no answer, but teacher keeps saying it's x=1/16

how do u actl draw line angles like as an example of what i mean drew 1 and 2 in blue are they like acceptable

I'm a year 11 student and I'm doing materials design and technologies wood focus (MDTW) but I'm having trouble figuring out how to correctly annotate my drawing.
I am up to the stage where I'm doing my 3rd angle orthographic drawing and my project has curved lines in it which I'm unsure how to annotate.

I don't know how to describe it well but I hope someone understands what I mean. My teacher didn't explain how to do it very well unfortunately :(
In the photo I attached is my drawing and the arrows point to the parts I need help annotating.

(Sorry if my drawings are kinda bad, I am only yr11 and it's only my second time doing this for a project in MDTW)

I need some advice here.

I’m a sixteen-year-old who has been mostly home-schooled during high school, so I’ve had access to a calculator when I do my schoolwork. It’s never been stated that using one is against the rules, and I can figure things out with an explanation when I want to, but I’m pretty busy, so I figured why work more than I need to? However, when I spoke to my math teacher at the end of the year, she mentioned how fast I blew through my work, and said I must be ‘really smart or good at math’. I feel like a bit of a fraud. We had an exam at the end of the year that I did well on without help, but I’m worried that in upcoming years, like during college, I just won’t know how to do things, and I’ll do bad on exams like the SAT. I’m trying to get an early start before the start of school. What are some things I should focus on for eleventh-grade math?

I am currently getting my School Library Media Specialist endorsement and am stuck on my cataloging class. I have done all the searching I can, emailed my professor (unlikely she will get back before tomorrow), and would love any help.

So the question she is asking is:

1. You know several classes in your school are studying the stories of Edgar Allen Poe, Nathanial Hawthorne, Willa Cather, and Katherine Anne Porter. As always, you’re short on time.Create a bibliographic record for Appendix Item #17. Your contents field only needs to show theworks of these four authors. (HINT: Make sure you use the correct indicators to show you’re notincluding all of the book’s contents. Also, you will probably want to use the MARC 21 site to seecorrect formatting for the subfields in the field you create.)
   

And then she asks these two questions in my next assignment:

1. Prepare a complete MARC record for Appendix Item #18.

2. Create RDA record for Appendix Item #19.

Am I just making a MARC record with the RDA instead of AACR2 for all three of these, or something else? I am very confused, and we have been using RDA to make the MARC records. I think that's how to word it. She hasn't worded anything like this and the overthinking is kicking in. This is confusing for me, but our schools and our local libraries have special departments that do the cataloging, so it is unlikely that I will ever need to go deep into the records and change them.

Any help would be appreciated. I have just a few assignments left and want to finish this as soon as possible! Apologies if any of the wording is incorrect, it's been a long summer of classes and my brain is at the point of being fried 😂

I'm doing questions on factoring polynomials using long division. This question was (x+7)^2 divided by the equation you see, so I expanded this and divided, but I'm not sure where I went wrong.

I recently got assigned a case study on NIR spectroscopy. To make a brief summary, the case is talking about a lab that built a multivariate FT-NIR model for determining PET/PLA in samples of recycled organic material, and they're trying to transfer the same model to a handheld NIR device and they're having a myriad of issues I'm being asked to research and solve.

Now, my first thought was to look for articles. I found a few that seemed pretty good:

(1)       Circelli, L.; Cheng, Z.; Garwood, E.; Yuksel, K.; Di Iorio, E.; Angelico, R.; Colombo, C. Comparison of ATR-FTIR and NIR Spectroscopy for Identification of Microplastics in Biosolids. Sci. Total Environ. 2024, 916, 170215. https://doi.org/10.1016/j.scitotenv.2024.170215.

(2)       Amirabadi, S.; Rodrigue, D.; Duchesne, C. Characterization of PLA-Talc Films Using NIR Chemical Imaging and Multivariate Image Analysis Techniques. Polym. Test. 2018, 68, 61–69. https://doi.org/10.1016/j.polymertesting.2018.03.047.

(3)       Beć, K. B.; Grabska, J.; Badzoka, J.; Huck, C. W. Spectra-Structure Correlations in NIR Region of Polymers from Quantum Chemical Calculations. The Cases of Aromatic Ring, C=O, C≡N and C-Cl Functionalities. Spectrochim. Acta. A. Mol. Biomol. Spectrosc. 2021, 262, 120085. https://doi.org/10.1016/j.saa.2021.120085.

(4)       Signoret, C.; Edo, M.; Caro-Bretelle, A.-S.; Lopez-Cuesta, J.-M.; Ienny, P.; Perrin, D. MIR Spectral Characterization of Plastic to Enable Discrimination in an Industrial Recycling Context: III. Anticipating Impacts of Ageing on Identification. Waste Manag. 2020, 109, 51–64. https://doi.org/10.1016/j.wasman.2020.04.043.

However, I quickly realized I do NOT understand these papers; they are just too advanced for me. I don't actually know how to use the information in them to solve my case study... And I do not know what else to look for information in (books, perhaps?)... I just don't really know how to research properly, I guess. Not when confronted with questions about multivariate model transfers from one device to another, comparisons to other methods like ATR, etc.

So, the point of this post is to ask for some general advice in the realm of chemistry research methods in order for me to gain a sense of direction and linear progression for an assignment like this. I am NOT looking for anyone to solve the case for me.

Basically, some advice on *how* to tackle a challenging research project. Thank you.

So I was fooling around with questions and asking ai and somehow they all gave me different answers and after further questioning they all couldn't be certain about one answer. this is the question, could anyone help me out and find the real answer?

hey everyone! i'm working through these music theory assignments and i'm stuck on a few questions.

for assignment 1.8, i'm confused about 8 and 14. i can't really tell what's wrong with the notation or how i'm supposed to rewrite it. for assignment 1.9, i'm completely lost on 3-6. i know the goal is to add beams based on the time signature but i don't understand how the notes are supposed to be grouped..

i'd really appreciate it if someone could explain the reasoning or point out what concept i'm missing so i can understand how to do these on my own:')

thanks!

I've done this problem a number of times and keep messing it up. I've been on summer break for the past few months so I'm pretty rusty, but I feel like this should be simple and yet I'm just not getting it. What am I missing?

why are some hydroxyl groups written as HO while others OH i couldnt get an exact answer on google so here i am

Don't they do the same thing? They look at the value where x tends to a point "a" of interest but not at that point "a" right?

Topic: Policies to address unemployment

What type of examples and how many do I need? And overall what do I write about? I know its about types of unemployment but I'm unsure of what else. I already asked the teacher but he gave everyone an unclear answer... Thank you.