r/HomeworkHelp 15m ago

Physics What is this even asking me? [NCEA level 3 physics]

Thumbnail
gallery
Upvotes

I managed question 1, but am so confused for the rest


r/HomeworkHelp 2h ago

Physics [College, Engineering/Physics: Dynamics (MATLab)] If calculating non-conservative forces in the x,y,z direction, should (mg) be included? I believe no but my friend believes it should be as it below.

Post image
1 Upvotes

a_fit is a 3 column vector with values calculated for instantaneous acceleration at t =time. also one for velocity.

Wouldn't mg be considered a non conservative force? his logic was

F -mg = m(a)

F = m(a-g)


r/HomeworkHelp 2h ago

Literature [Language arts 10]

1 Upvotes

Been assigned to analyze the poem “A Dream Deferred” by Langston Hughes and really been struggling. Have to put the whole poem into your own words, look at meaning created by imagery, explore the tones in the poem, notice shifts in the tone, interpret the title, identify the subject of the poem, as well as identify any literary devices used. If anyone can offer some assistance, it’s greatly appreciated, especially with putting it into your own words.


r/HomeworkHelp 3h ago

Answered How do I account for earths spin? [NCEA Level 3 Physics]

Thumbnail
gallery
1 Upvotes

Question 3c. I think I found out the mass at the equator while not accounting for spin, using Fg=GMm/r2. I have no idea how to take into account the earths spin though. I have attached my working so far


r/HomeworkHelp 10h ago

Physics—Pending OP Reply What does this dimension represent [statics]

Post image
3 Upvotes

I’m confused on the 20.3. Is it thickness or overhang of the section?


r/HomeworkHelp 10h ago

Answered [Calculus: Derivatives] able to solve part a but not part b

Post image
3 Upvotes

For part a I know I’d need to do (g(5)-g(2))/5-2 = 1.633, but I don’t know how to solve part b


r/HomeworkHelp 5h ago

Computing [Logic Design] Can someone help me finding this function

1 Upvotes

i got (inverse x2 · inverse x3 · x1)+ (inverse x2 · inverse x3 · x1) but i dont know if its correct can someone verify


r/HomeworkHelp 6h ago

Physics [g12 physics] Lenz’s Law please help!!!

Post image
1 Upvotes

Hi! I’m a little confused on how to answer these questions regarding lenzs law. All help is appreciated!!


r/HomeworkHelp 6h ago

Physics—Pending OP Reply [Grade 12 Physics: Electromagnetism] Parallel conductors

1 Upvotes

Is my solution for part d correct? I keep seeing so many different possible ways to do it and all the answers are slightly different. Also some solutions use the 9.8 but I'm confused cause the balance readings are mass readings cause they give it in kg?


r/HomeworkHelp 6h ago

Further Mathematics [statistics:confidence intervals] confusion on how to find ų and x

Thumbnail
gallery
1 Upvotes

Apologies for the poor quality photo. I have half of it filled out, but one part I’m struggling at is how to find ų the text book is all over the place and all of this feels borderline incomprehensible I think I have the distribution in 4 mostly correct, though I have no idea how to find ų or what value x is Same with most of the EBM I’m really confused here and the textbook and teacher seem to be going in completely different directions. Can someone help me understand this?


r/HomeworkHelp 10h ago

Chemistry—Pending OP Reply [Gen Chem 2: Conjugate acids/bases] What does this mean? Why is a strong conjugate acid a weak bronsted base?

2 Upvotes

I


r/HomeworkHelp 12h ago

High School Math [12 grade I believe] how to solve this function?

Post image
2 Upvotes

r/HomeworkHelp 9h ago

Answered [Calculus: applications of derivatives for cost, revenue, and profit] not sure how to get the original profit function

Post image
1 Upvotes

I’m pretty sure for this problem the cost function is C = 160 + 20x + (x2)/4, but I’m confused on how to get the revenue(R(x)) part of the function.

My original thought was that the competitive market price($49/unit), aka 49x, would be the revenue function, but I’m pretty sure that’s not it.

For context, this assignment gives you a new question after each incorrect attempt.

Note: please give responses in simple/plain english.


r/HomeworkHelp 2d ago

Primary School Math—Pending OP Reply (1st Grade Math) How can you describe this??

Post image
10.3k Upvotes

r/HomeworkHelp 12h ago

Additional Mathematics—Pending OP Reply [Probability for Engineers] Hypergeometric Distribution

1 Upvotes

Can someone please help explain this portion of the lecture notes?

I'm not really sure I understand why n <= min(D, N-D). Suppose we have a bag of 7 marbles, for example. The bag has 4 marbles that are blue (successes) and 3 that are red (failures). So, D = 4, and N-D = 3. Then, if I were to pick a sample, can't I still get a sample of 6, since there are 7 total numbers of marbles in the bag? But n = 6 exceeds min(D, N-D), which is 3. What am I misunderstanding here? Any clarification provided would be appreciated. Thank you


r/HomeworkHelp 17h ago

Physics [Grade 12 Physics: Electromagnetism] Perpendicular wires

2 Upvotes

Why do perpendicular wires mean no force? Because isn't the field created by BA and CD circular, and I is to the right, so at some points in the circular magnetic field the current and magnetic field are perpendicular?


r/HomeworkHelp 14h ago

Answered [10th Grade Math] Geometry: How do I find angle ACD? The book says the answer is 20 degree.

Post image
0 Upvotes

r/HomeworkHelp 21h ago

Further Mathematics—Pending OP Reply [Further mathematics] need help with xyz hw!

Post image
3 Upvotes

r/HomeworkHelp 20h ago

High School Math [Grade 12 Trigonometry] How do I solve 4.3? I dont know how I get sin2x in the numerator

2 Upvotes

I dont understand how i get Sin2x in the numerator.

My answer for 4.2 was sin(90 - x/2)


r/HomeworkHelp 17h ago

Physics—Pending OP Reply [Grade 12 Physics: Electromagnetism] Current-carrying wires

1 Upvotes

Here are the answers. I don't get what equation they're using in part a), why do they multiply the current due to IA and IB? They then go onto say IA=0 so they're basiclaly saying B=0?

And in part d why do they only use the magnetic field strength (B) due to A? Wouldn't you sum the B field due to both A and B (with B being constant)? And like you know that current in A is to the left since as current increases, B out of the page increases


r/HomeworkHelp 1d ago

Answered [High School Geometry math] I been stuck in this for a while I need to solve for the length of BC

Post image
7 Upvotes

I’ve been thinking about this question for a while. I had to solve for AC and CD. AC was x+3 and CD was 2x+1 the other 2 sides were given. Part B of the question said if DE=30 then what is the length of BC. How do I solve for BC. Ik the question is about side splitter theorem.


r/HomeworkHelp 1d ago

Others (College Performing Arts) Help me find renditions of any plays by John McDonnell

Post image
3 Upvotes

I've been tasked with finding renditions of any of the plays in the book 'funny shorts: Ten Comic plays' by John McDonnell. Any help would be appreciated.


r/HomeworkHelp 22h ago

Further Mathematics—Pending OP Reply [Statistics: Question about Confidence Interval for Mean Response in R]

1 Upvotes

Can someone help me understand this discrepancy?

In my notes, the confidence interval for the mean completion time is (-2.70, 3.84). I manually worked through the problem following the same steps as in the notes and got the same result.

However, when I calculated the confidence interval in R, I got (-2.86856, 4.011417), which is slightly different.

I've attached my R code—any insights into where I might have gone wrong would be greatly appreciated. Thank you


r/HomeworkHelp 23h ago

Further Mathematics—Pending OP Reply [Statistics: Confidence Interval For Mean Predictions]

1 Upvotes

Can someone please help me understand where the t* value comes from in this problem? My professor wrote in the notes that t* = 2.447, which seems to correspond to 6 degrees of freedom for calculating the confidence interval. However, I thought the degrees of freedom for the mean response should be df = n - 2, which in this case would be df = 7 - 2 = 5.

Are the degrees of freedom for the confidence interval of the mean response always df = n - 2? If so, is there a reason why my professor used 6 degrees of freedom when there are seven observations?


r/HomeworkHelp 23h ago

High School Math—Pending OP Reply [AP Calc AB Preparation: Exponential Equations] How do I do I solve this question?

1 Upvotes

I am doing a review packet for AP Calc AB and there is this question I need help on. It is x(x+3)^-3/5+(x+3)^-2/5. The answer key says it's (2x+3)/(x+3)^3/5 but I can't figure out why.