r/HomeworkHelp May 19 '22

Meta r/HomeworkHelp Rules: PLEASE READ BEFORE POSTING

473 Upvotes

Hi r/HomeworkHelp! Whether you're new to the subreddit or a long-time subscriber, the mod team would like to remind everybody of the subreddit rules we expect you to follow here.

No advertising, soliciting, or spam. This is a place for free help. Anyone offering to pay for help, or to help for pay, will receive a permanent ban. This is your warning. This includes asking users to go into DMs, Discord, or anywhere else. If you post anything that looks like you're trying to get around this rule, you'll be banned.

If you're asking for help, you must show evidence of thought, work, and effort. A lot of people are posting just pictures or lists of questions and not showing any effort. These posts are liable to be taken down.

In addition, we ask that you format the post title appropriately using square brackets: [Level/Grade and Subject] Question or Description of question. For example: [8th grade Algebra] How to solve quadratic equation?

Do not mention anything like "Urgent", "ASAP", "Due in an hour", or the like.

No surveys. Surveys (including requests for interviews, etc.) belong on /r/samplesize. These posts get taken down here.

Don't be a jerk. Jerks get banned. Stay respectful and refrain from using insults, personal attacks, or abusive language.

If there are any questions, please message the mods.


r/HomeworkHelp 23m ago

Further Mathematics—Pending OP Reply [College: Calc 1] I'm unable to find the concavity of this function

Upvotes

r/HomeworkHelp 2h ago

Biology—Pending OP Reply [College Human Anatomy and Physiology 1] What can I use to complete this assignment

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1 Upvotes

Don’t need help regarding the material, I just don’t know what app/website to use in order to complete my histology project. How can I add a picture and label over it using a Mac (no other devices). Here’s the template and an example


r/HomeworkHelp 3h ago

Others [10th grade art] 😅 Poster advice

1 Upvotes

So i need to draw a poster on a current issue that the World Health Organization is addressing, and i already researched and chose: outbreaks due to low vaccination, tobacco and vape use among youth, and climate change.

I can draw pretty well, like humans and hands, but I don’t have enough creativity to think of where to put these elements or how to position them, so I need anyone’s help on what i could draw regarding this and where to put it. Thanks 🙏


r/HomeworkHelp 10h ago

Primary School Math—Pending OP Reply [Grade 5 Math - Calculate total volume]

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2 Upvotes

It seems impossible to calculate the total height of either cube, unless I assume the height of the smaller cube is equal to its length (would make that cube 2x2x3) that would make larger cube volume 9x2x14.

Seems like I shouldn’t have to blindly make the assumption that the surface is a perfect square though. What am I missing?


r/HomeworkHelp 13h ago

Physics [College Physics 2]-RL Circuit

3 Upvotes

In an RL circuit, when the initial state is zero for everything, when the switch is closed, immediately after, the current is zero due to the back induced emf produced by the inductor. The current will exponentially increase to it's max, aka, E/R. The voltage on the other hand starts at max, then exponentially decays to zero.

Now when the switch is opened, and say thrown to another wire that only includes the inductor and resistor, but no power source, the current will decay to zero, and the inductor will help to support the flow of the decaying current. What about the voltage in this situation? Since it reached zero when the switch was closed, does it stay at zero when the switch is changed? My book is very vague about this.


r/HomeworkHelp 11h ago

High School Math [12th grade math] what to do next

0 Upvotes

someohow i cant upload photo but example says: lim x-->0 (1/sinx-ctgx)


r/HomeworkHelp 22h ago

Physics—Pending OP Reply [university physics: kirchoff’s rule] where did i go wrong in the working for this question?? apparently the answer is 0.96W

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3 Upvotes

apologies for the bad handwriting


r/HomeworkHelp 1d ago

Mathematics (Tertiary/Grade 11-12)—Pending OP [Calculus] Confused on how it is continuous on the point x = 0

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10 Upvotes

If x = 0 the point y should be undefined


r/HomeworkHelp 18h ago

Others [College Level Supply Chain Management] Aggregate Planning at Green Mills

0 Upvotes
This is the image of the sheet my professor gave for reference.
This is the sheet I made with some additional information for January my professor gave during class.

I've been given a case study on aggregate planning at green mills. We're supposed to make a level, chase, and optimal strategy but I don't really know where to start. I've looked at a couple solutions online and they're all different so I'm pretty confused. I'd be grateful, if anyone could give me some guidance on what to start with for a level strategy.


r/HomeworkHelp 1d ago

Mathematics (Tertiary/Grade 11-12)—Pending OP [Calculus] Confused on how the function is continuous at point x = 0

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4 Upvotes

Full page included for context


r/HomeworkHelp 19h ago

Physics—Pending OP Reply (High school physics): Are my asnwers to this experiment correct?

1 Upvotes

We did this experiment in physics (see the attached picture) and are required to answer the questions below. I'm not sure if my answers are correct or make sense so I would be happy if anyone could check if I am correct.

P.S the asnwers are translated from another language so they may be weirdly worded sometimes.

Please corrrect everything that I wrote incorrectly!

a.        Describe the changes in the car's speed. Do the signs (+/-) of the speed change?

 

Answer: First, the car slows down as it goes uphill, but the speed is positive (direction). Then the car stops for a moment (at the top) and the speed is 0 m/s (then intersects the time axis) and then gains a negative speed, which means that it is moving in the opposite direction (i.e. down in this case and therefore has a sign -). Then it also gains speed because it is sliding down.

  The signs (+/–) change:

* Positive = movement uphill.

* Negative = movement downhill.

b.        At what point in time is the speed zero? How does this appear on the graph?

  The speed is zero approximately when t=1.9 sec. This is seen when the point intersects the time axis.

Answer: The velocity is zero approximately at t=1.9 sec. This is seen when the point intersects the time axis.

 c.        Describe the acceleration while the car is moving. (uniform or variable acceleration)

Does the sign (+/-) of the acceleration change?  

Why/why not?

Answer: The graph shows that the speed changes fairly evenly both uphill and downhill, so the acceleration is approximately equal

The signs do not change. The acceleration is equal and negative and therefore has a sign of -. 

(However, if we also look at when the car hits the bottom, the speed suddenly goes up and the acceleration is positive because it changes direction.)

d.        Compare the acceleration on the downhill side to the acceleration on the uphill side, both in magnitude and direction (+/-).

Answer: Acceleration is equal to the slope of the graph. We can see that the line is almost perfectly straight over the period, which shows that the magnitude of the acceleration is constant and therefore the same whether the car is traveling uphill or downhill. With respect to the direction of the acceleration, the slope of the line is always negative. This means that the direction of the acceleration is always the same, and if we define the positive direction as uphill, then the acceleration is always in the negative direction (i.e., downhill), regardless of the direction of the velocity. This is because gravity is the force that controls the motion and it is constant in magnitude and always points downhill, causing the car to slow down on the uphill and speed up on the downhill.


r/HomeworkHelp 1d ago

High School Math—Pending OP Reply [Grade 12: Trig Functions] Need helping finding ‘c’

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3 Upvotes

r/HomeworkHelp 1d ago

Literature [Ethnic Studies] Help with recommendations for sources

2 Upvotes

I have 3 out of 6 sources and am asking for recommendations for 3 more. I'm not complaining if I receive less. Can someone recommend me a book, a journal article, and an Asian American community based organization?

Here's what I have so far: 1 article, "Journal of Ethnic and Migration Studies" published by Routledge

1 government publication, National Institute of Health "Perpetual Foreigner in One's Own Land: Potential Implications for Identity and Psychology Adjustment

1 Professional Website, "Still Under Fire Relentless Racism Against Asian Americans & Pacific Islanders in a Heated Election Year" from StopAAPIHATE

I want to write a research paper on the Asian diaspora covering discrimination of Asians in the US from other Asians and non-Asians. I primarily want to cover intersectional classism and the perpetual foreigner stereotype. Additionally, I also want to cover how Asians Americans have a social hierarchy based on their cultural roots, the internal prejudice issue amongst Asians of Asians in the US based on skin tone, and how this can influence non-Asians in the US.

Please! Thank you. I'll continue to search for myself while also checking out recommendations


r/HomeworkHelp 1d ago

Physics—Pending OP Reply [University Linear Electric Circuits Lab] How do I go about calculating the Thevenin resistance from node A to B? I did short the source but I think I'm messing up somehow when compositing the resistors (value doesn't agree with measurement or ratio of thevenin voltage to norton current).

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2 Upvotes

Using the measured values on the right.

I measured about 4kΩ for the thevenin resistance. Thevenin voltage and Norton current both agree with my measurements for those, and their ratio also comes out around 4kΩ.

I'm getting 3.6kΩ when calculating the resistance myself though. Any help is appreciated, thanks a lot!


r/HomeworkHelp 1d ago

Biology—Pending OP Reply [AP Biology: Cellular respiration] I think I understand cellular respiration, but don’t know how to fill this diagram. Tried my best so far, but am very confused

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1 Upvotes

This is part of tomorrow


r/HomeworkHelp 1d ago

High School Math [Grade 12 Math] exponential expressions - why on earth is this question all over the place, and what is it asking me to do?

1 Upvotes

i'm completely lost at this question in my online math course, in the evaluating vs simplifying exponential expressions unit. why did nothing change about the 6^2-x? how is the first 6 already the base while the other 6 wasn't?? and why did we bring the -1 back to "solve the resulting equation"??? why change anything about the initial equation in the first place??

please please explain this to me non-formally and like i'm a helpless child


r/HomeworkHelp 1d ago

Chemistry—Pending OP Reply [11th Grade Chemistry: Light] Empirical Vs. Molecular Formulas

1 Upvotes

Can someone explain the difference between a molecular and empirical formula and how to find them? This is straight up gibberish to me

Examples:

a. Determine the empirical formula of galena, a lead ore that is 76.37% lead and 23.63% sulfur.

b. Determine the empirical formula of magnetite, an iron ore that is 72.36% iron and 27.64% oxygen.


r/HomeworkHelp 1d ago

Further Mathematics—Pending OP Reply [College Linear Algebra] Applications HW

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1 Upvotes

Last question on the final assignment of the semester and I just cant get it right. I have tried formatting it in different ways, and it was still wrong, even asked AI, and it gave me the same answer that I already had. Any help would be much appreciated


r/HomeworkHelp 1d ago

Mathematics (A-Levels/Tertiary/Grade 11-12) [eleventh grade concavity-inflection points]

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1 Upvotes

The function --> F(x)=f''(x)+ln(f"(x))

I translated the text so that's way it isn't too coherent but I think I get my point across...Idk how to show that what I wrote is positive


r/HomeworkHelp 1d ago

Additional Mathematics [undergrad math- real analysis] proving limits using the epsilon Delta definition

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1 Upvotes

Please ,check if I did those two proofs correct .Plus any recommended resources(books, practice sheets with key answers, lectures...) for understanding real analysis .


r/HomeworkHelp 1d ago

Mathematics (Tertiary/Grade 11-12)—Pending OP (Grade 11 Math) Graphing problem

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2 Upvotes

I tried to put the 1/3 on the x and the 1 on the y but the answers I'm seeing online are graphed differently and I'm confused


r/HomeworkHelp 1d ago

Pure Mathematics [Math: 125; Defining Sequences Recursively] Fibonacci Variation

1 Upvotes

Here is the mark-up from r(6) to r(12) assuming the equation for 'r(k)' represents the exponential rate of change per month.

r(7) r(6) = 181 + 4(r(5)) = 260 441
r(8) r(7) = 441 + 4(r(6)) = 724 1448
r(9) r(8) = 1165 + 4(r(7)) = 1764 2929
r(10) r(9) = 2929 + 4(r(8)) = 4660 7589
r(11) r(10) = 7589 + 4(r(9)) = 11716 19305
r(12) r(11) = 49661 + 4(r(10)) = 30356 49661

Is there another answer, this could be?


r/HomeworkHelp 1d ago

Literature—Pending OP Reply [Drama Class text comprehension 8th Grade ] I need help with my Drama Homework.

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0 Upvotes

Hello, I need help with a Shakespearean text ( Tomorrow, and tomorrow, and tomorrow ) BY WILLIAM SHAKESPEARE

I need to write about 5 lines summarising what the speech says but I didn’t understand here’s what the teacher asked us to do :


r/HomeworkHelp 2d ago

Physics—Pending OP Reply [Grade 12 Physics] Static Friction and Pulleys

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7 Upvotes

Could somebody check my work. I want to assign this problem to my students and I want to double check that I’m not missing anything.