The Official Homework Help Thread

If anybody ever needs French help...well, let's just say I have (somehow) accumulated over 4000 hours of being taught in French. Well, I guess that's my reward for 9 years of immersion. :P Anyways, always willing to help! Just PM me!
 
How do you balance chemical equations? I'm still confused even after asking my science teacher about it.

Ex. SO2 + O2 -> SO3 I don't know what to do
 
How do you balance chemical equations? I'm still confused even after asking my science teacher about it.

Ex. SO2 + O2 -> SO3 I don't know what to do

Funny enough, my chemistry homework today involved balancing chemical equations :p

It helps to focus on balancing one element first. Let's start with the sulfur since oxygen is being shared in two places (in the sulfite (?) and oxide). There is 1 sulfur on both sides of the equation, so let's leave it at that. With the oxygen, there is 4 oxygen on the left and 3 on the right. 4 and 3 share a common multiple of 12. Try to make both sides have 12 oxygen and hopefully you can work your way from there :)
 
For the first one, multiply 0.15 and 145 together, then add that to 145. Multiply 0.15 of that and repeat the same steps 4 times.

As for the second one, look up an inverse variation formula and that should help you.

or just 145(1.15^4) if you don't have infinite time
 
Funny enough, my chemistry homework today involved balancing chemical equations :p

It helps to focus on balancing one element first. Let's start with the sulfur since oxygen is being shared in two places (in the sulfite (?) and oxide). There is 1 sulfur on both sides of the equation, so let's leave it at that. With the oxygen, there is 4 oxygen on the left and 3 on the right. 4 and 3 share a common multiple of 12. Try to make both sides have 12 oxygen and hopefully you can work your way from there :)

Hmmm still a bit confused but that did help so thanks! Doesn't help that my teacher barely explained how to do it and left it to us to know how to do it
 
does anyone have experience with video editing? we have to put together a trailer for something in my film class but i have no idea how to meet my teachers expectations in terms of special affects and everything. i just started this class last week and we barely learned anything when it came to video editing. despite the fact that everyone in the class is an amateur, the teacher expects the work of a pro, from what he said :/ i really need a good grade on this too; i was also told that from now until the end of the year, we'll only be having like three huge assignments. this is one of them, everything else is just learning and practice

anyway, if you'd like to help, i can pm you with the rest of the details. all i need help on is advice on video editing in general, what to do to get the viewer hooked in the beginning, and just cool affects that i should use and experiment with. we're told to work on this project at home too, so im using a basic video editor; windows movie maker. after this project, we'll be provided a much more advanced/expensive program
 
For the first one, multiply 0.15 and 145 together, then add that to 145. Multiply 0.15 of that and repeat the same steps 4 times.

As for the second one, look up an inverse variation formula and that should help you.
thanks for the answer~


I have another one i'm not sure of.. what's the formula/method in doing this equation? http://prntscr.com/9o8bz7
 
i have to write an essay about a turning point in history
i chose the russian revolution

only thing is, i feel like my essay is too spread apart. the prompt is very very vague. i dont know if writing about the soviet union is really connected to the russian revolution - my point in the essay is that without the russian revolution, the soviet union would have never rose, and therefore north korea and north vietnam would have never been able to succeed without russian support. that and there never wouldve been a super big communist scare in the western world. i feel like my essays more about the soviet union than the russian revolution though.. so idk what to do
 
thanks for the answer~


I have another one i'm not sure of.. what's the formula/method in doing this equation? http://prntscr.com/9o8bz7

It says the whole triangle is an equilateral triangle, which means all the sides are the same length (in this case, 6) and all the angles are the same (60 degrees). Notice that the line cutting through the triangle also cuts the base of the triangle in half. The question asks for triangle ABC's perimeter. We know AC is 6, and the line cutting through the triangle splits the base of the triangle in half, so 6/2 is 3. To find side AB, you have to know some of the rules for 30-60-90 triangles and their sides (triangle ABC is 30-60-90 because angle ABC is a right angle, angle ACB is a 60 degree angle, leaving the last angle 30). The second longest side, side AB, is supposed to be the shortest side (side BC) multiplied by the square root of 3. Add all the sides together and you should get your answer. You should also probably look up some of the rules for 30-60-90 triangles in case you run into problems like this again :)
 
Yea I got 61 too

1 + 5 + 11 = 17
5 + 11 + 17 = 33
11 + 17 + 33 = 61

idk where the 5 came from tho :/

doesnt matter, the beginning of sequences are gonna be arbitrarily decided
 
idk I feel like the 5 (and 11) have more significance than that
if the sequence is really that simple more than 1 person would have figured it out

- - - Post Merge - - -

and most sequences can go into negatives
 
http://prntscr.com/9or2py What's the pattern? Apparently only 1 in my class got it right with solution.

61 appears to be the "correct" answer. Sadly though, each of those answers could be deemed "correct". If you give enough thought to it, one could make a rule which generates the 5th term of that sequence to be (b), (c), or (d) as well.
 
i'd just like to point out that theres this site thats pretty useful when it comes to math if you'd like to add it to your list
http://www.virtualnerd.com/

--

i started an amateur photography classes this semester, and our first assignment sounds easy enough - but im completely blank on ideas. we basically just have to take a minimum of forty pictures of the same general theme (nature, abstract, etc), and they all have to be completely different. this was assigned today and due friday - the problem is that i live in a pretty boring area, so there's not much to take a picture of. i live by the woods and next to a park, so that would be good for a nature theme - my options are limited though

id appreciate just suggestions on what simple things i can go by using typical every day things that we see. we're getting marked for how professional the pictures look by its angle and everything, but we've barely been taught anything about angles. according to our teacher, she already told us everything there is to know, which i dont recall at all :/ so if you guys know anything about angles, tips for that are appreciated as well
 
Last edited:
Back
Top