Official BMGf Homework Tutor/Help Thread - Page 5

Page 5 of 12 FirstFirst ... 34567 ... LastLast
Results 61 to 75 of 178
Like Tree11Likes

Thread: Official BMGf Homework Tutor/Help Thread

  1. #61
    previously lizzxxk. Vagabunda's Avatar
    Join Date
    Aug 2010
    Gender
    Female
    Location
    US Central Time
    Posts
    926

    Default Re: Official BMGf Homework Tutor/Help Thread

    Username: lizzxxk
    Best subjects: English (reading comprehension and grammar) and math up to multivariable calculus
    Credentials: I've never received less than an A in an English course, got a 36 on the reading section of the ACT, and I'm currently taking multivariable calculus. I'm a senior in high school.

    I'll probably be on here for math or European History help :I

    EDIT:
    Also, I can help with basic Spanish.
    I'm upto high-intermediate level comprehension.
    Last edited by Vagabunda; 18th October 2010 at 03:07 AM.

    Pearl FC: 0131 6674 2041 | White FC: 4727 7263 2313

  2. #62
    Now with capital letter Pseudonym's Avatar
    Join Date
    Dec 2009
    Gender
    Male
    Location
    In your screen
    Posts
    124

    Default Re: Official BMGf Homework Tutor/Help Thread

    Quote Originally Posted by Heathcliff Huxtable View Post
    I'm not sure if I remember how to solve these kinds of problems but I'll give it a shot.

    Assuming the heat of fusion for ice is 334 J/g, the amount of energy required to melt 100g of ice is (100g)*(334J/g) = 33400J. This amount of energy must be absorbed from the rest of the system. The following equation can be used to determine the temperature change of the water:



    (q is the energy transferred, m is the mass of the substance, c is specific heat capacity of the substance, delta T is the change in temperature)

    Substituting in all known values, we are left with

    -33400J = (1000g)*(4.184J/g*C)*delta T

    Solving for delta T, we have

    delta T = (-33400J)/[(1000g)*(4.184J/g*C)] ≈ -7.98 degree C

    Solving for the final temperature, we get

    80 degree C + (-7.98 degree C) = 72.0 degree C

    You can adjust these values for significant figures as you see fit. You also may want to check my work to see if I made any mistakes.
    Yes, the problem is that I tried that too and it gave me the same result, but the book from which I'm doing the exercise says that the answer is 66 degree C.
    The path of a pseudo-champion.

    SuBuWriMo total: 3588 words.

  3. #63
    TheMissingno.'s Avatar
    Join Date
    Feb 2009
    Gender
    Male
    Location
    No.
    Posts
    15,034
    Trophies
    Blog Entries
    408

    Default Re: Official BMGf Homework Tutor/Help Thread

    Quote Originally Posted by pseudonym12 View Post
    Yes, the problem is that I tried that too and it gave me the same result, but the book from which I'm doing the exercise says that the answer is 66 degree C.
    Maybe the book is incorrect?

    Quote Originally Posted by Rakarei View Post
    It seems to me we've got far more people volunteering to help than people looking for help.
    I'm pretty sure no one would be able to help me with mine. -_-
    That's nice.

  4. #64
    previously lizzxxk. Vagabunda's Avatar
    Join Date
    Aug 2010
    Gender
    Female
    Location
    US Central Time
    Posts
    926

    Default Re: Official BMGf Homework Tutor/Help Thread

    Quote Originally Posted by pseudonym12 View Post
    Yes, the problem is that I tried that too and it gave me the same result, but the book from which I'm doing the exercise says that the answer is 66 degree C.
    Let's see... 333.55 J/g * 100 g = 33355 J
    Q = 100 g * 4.1813 J/(g*K) * 80 K
    Q = 33450 J + 33355 J = 66805 J
    -66805 J = 1100 g * 4.1813 J/(g*K) * dT
    -66805 J = 4599.4 J/K * dT
    -14.524 K = dT
    80 C - 14.524 C = 65.48 C ~ 66 C

    You have to account for heating the ice to 80 degrees. Then you incorporate the new mass in your later calculations.

    Pearl FC: 0131 6674 2041 | White FC: 4727 7263 2313

  5. #65
    Hi Rayne's Avatar Retired Staff
    Join Date
    Sep 2004
    Gender
    Male
    Location
    Maryland
    Posts
    4,152
    Blog Entries
    27

    Default Re: Official BMGf Homework Tutor/Help Thread

    Quote Originally Posted by TheMissingno. View Post


    I'm pretty sure no one would be able to help me with mine. -_-
    And what would that be out of curiosity? I wouldn't underestimate the experience of the people here so easily. ;)

    -In Simple Harmony-

  6. #66
    TheMissingno.'s Avatar
    Join Date
    Feb 2009
    Gender
    Male
    Location
    No.
    Posts
    15,034
    Trophies
    Blog Entries
    408

    Default Re: Official BMGf Homework Tutor/Help Thread

    Quote Originally Posted by Rayne View Post
    And what would that be out of curiosity? I wouldn't underestimate the experience of the people here so easily. ;)
    (yay, now I get to brag!) Right now, turbulent flow. The first question on my assignment is "Derive Reynolds-averaged mass conservation equation and Newton’s second law for a fluid." That one isn't too bad, but it just gets worse from there.

    If there are any aerospace engineering seniors or aerospace/mechanical engineering grad students out there, I'd love to get some help!
    That's nice.

  7. #67
    Hi Rayne's Avatar Retired Staff
    Join Date
    Sep 2004
    Gender
    Male
    Location
    Maryland
    Posts
    4,152
    Blog Entries
    27

    Default Re: Official BMGf Homework Tutor/Help Thread

    F*cking fluids. I'm guessing this isn't as easy as finding Reyonld's Number is it? XD

    I feel your pain, though thankfully we were not put through derivations. I'm a recent Civil Engineering grad, so yes, you aerospace and mechanicals can have your last laugh yet again for claiming to the superior studies. The best I can do is work it through with you, perhaps, though differentials and vectors were never left a good taste in my mouth. It seems you're going after Navier-Stokes, and I'm sure you've checked the Wiki on this, among other places, no?

    That's where I'd start out if I were lost. Or just ask one of my aerospace friends to help >>
    Last edited by Rayne; 18th October 2010 at 08:51 PM.

    -In Simple Harmony-

  8. #68
    Registered User Mintaka's Avatar
    Join Date
    Sep 2010
    Gender
    Female
    Location
    GMT +9
    Posts
    10,524
    Blog Entries
    80
    Follow Mintaka On Twitter
    Follow Mintaka on Tumblr

    Default Re: Official BMGf Homework Tutor/Help Thread

    Username : Min
    Best subjects : English comprehension (and learning more advanced now), Biology
    Credentials: I learned biology since middle school so I think I can be of help. I always maintained a grade of A in the subject. A bit of chemistry too. Currently I am a freshman at college, biology major.

    I think I'll take biology here as well as English. I can write essays pretty well.

    FC: 2294-4703-4926 | 제노바
    Friend Safari Info: Flying (Pidgey, Hoothoot, Fletchfinder)

  9. #69
    Registered User
    Join Date
    Oct 2009
    Posts
    780
    Blog Entries
    9

    Default Re: Official BMGf Homework Tutor/Help Thread

    Quote Originally Posted by lizzxxk View Post
    Let's see... 333.55 J/g * 100 g = 33355 J
    Q = 100 g * 4.1813 J/(g*K) * 80 K
    Q = 33450 J + 33355 J = 66805 J
    -66805 J = 1100 g * 4.1813 J/(g*K) * dT
    -66805 J = 4599.4 J/K * dT
    -14.524 K = dT
    80 C - 14.524 C = 65.48 C ~ 66 C

    You have to account for heating the ice to 80 degrees. Then you incorporate the new mass in your later calculations.
    Yeah, I had a feeling I was missing an important step. I forgot to assume that the ice and the water are no longer separate systems at the end of the problem.

  10. #70
    I'm a wizard. Frantic's Avatar
    Join Date
    Sep 2010
    Gender
    Male
    Location
    Hoenn, in 3D!!!
    Posts
    115

    Default Re: Official BMGf Homework Tutor/Help Thread

    I was looking through this thread and sorry for asking such a basic question compared to the ones here, but can someone please explain WHAT THE **** IS A FLOW PROOF!!! I mean, I know what a 2-column proof and a paragraph proof are and how to do them, but can someone please explain what a flow proof looks like and how to do them please?

    Credit to Blazaking for the banner.
    Nyan. ~Nyan Cat

  11. #71
    Get those Devil Horns up Magmortar123's Avatar
    Join Date
    Nov 2009
    Gender
    Male
    Location
    Hesperia, California, United States
    Posts
    4,405
    Blog Entries
    35

    Default Re: Official BMGf Homework Tutor/Help Thread

    Man, I wish I could help you there, but Geometry is my math weak point. If I remember correctly though, it's basically a proof where you draw arrows to your answer in the proof. Man this is difficult over a computer. So suppose you have Triangle ABC and it is Isosceles. You must Prove side "A" is equal to side "B" So you would solve accordingly, but draw arrows. Terribly sorry if I gave incorrect info, geometry is my weak point.
    My stats
    BMGF Mentor Program!
    Quote Originally Posted by Jerry Springer
    Would you dance on a Czechoslovakian?
    I strongly support DaniHime (Me X Orihime)

  12. #72
    I'm a wizard. Frantic's Avatar
    Join Date
    Sep 2010
    Gender
    Male
    Location
    Hoenn, in 3D!!!
    Posts
    115

    Default Re: Official BMGf Homework Tutor/Help Thread

    Awesome! It sounds correct if you compare it to the name. But then again, that could just be my opinion. XD Well, thanks so much anyways. Now anytime I have school trouble, I'm coming here. ID

    Credit to Blazaking for the banner.
    Nyan. ~Nyan Cat

  13. #73
    The Fallen Hero CuboneKing's Avatar
    Join Date
    Sep 2009
    Gender
    Male
    Location
    Runaway Planet
    Posts
    1,126
    Blog Entries
    103
    Follow CuboneKing On Twitter
    Visit CuboneKing's Youtube Channel

    Default Re: Official BMGf Homework Tutor/Help Thread

    I can help out with geography too.
    ALFALFA
    Quote Originally Posted by Mijzelffan
    People who haven't played Mario Kart haven't lived their life to the fullest.

  14. #74
    Avada Kedavra! Morru Magnum's Avatar
    Join Date
    Apr 2010
    Gender
    Genderless
    Location
    The Land of OOO
    Posts
    3,540
    Blog Entries
    5
    Add Morru Magnum on Facebook

    Default Re: Official BMGf Homework Tutor/Help Thread

    Can anyone give me the complete chemical equation for these: (With the product side included.)

    Magnesium Ribbon + Water
    Iron Nail + Sulfuric Acid
    Baking Soda + Vinegar
    Chalk + Water
    Chalk + Hydrochloric acid
    Copper Filings + Concentrated sulfuric acid
    zinc + Hydrochloric acid
    Copper Sheets + Oxygen gas ->(heat)
    Magnesium Ribbon + Oxygen gas ->(heat)
    Calcium Carbide + H2O
    Sulfur Powder + Oxygen gas ->(heat)
    Sugar + Oxygen gas ->(heat)
    Copper Sulfate Pentahydrate + Oxygen gas ->(heat)
    Copper Sheets + Oxygen gas

    BANNER BY Blue Dragon
    JOIN Pokémon URPG TODAY!
    | URPG Stats | Curator Log | Ref Log | Violet Gym |


  15. #75
    Unregistered User Rakarei's Avatar
    Join Date
    Apr 2010
    Gender
    Male
    Location
    City on the Edge of Forever
    Posts
    1,876
    Blog Entries
    206

    Default Re: Official BMGf Homework Tutor/Help Thread

    Quote Originally Posted by MorruMaster14 View Post
    Can anyone give me the complete chemical equation for these: (With the product side included.)

    Magnesium Ribbon + Water
    Iron Nail + Sulfuric Acid
    Baking Soda + Vinegar
    Chalk + Water
    Chalk + Hydrochloric acid
    Copper Filings + Concentrated sulfuric acid
    zinc + Hydrochloric acid
    Copper Sheets + Oxygen gas ->(heat)
    Magnesium Ribbon + Oxygen gas ->(heat)
    Calcium Carbide + H2O
    Sulfur Powder + Oxygen gas ->(heat)
    Sugar + Oxygen gas ->(heat)
    Copper Sulfate Pentahydrate + Oxygen gas ->(heat)
    Copper Sheets + Oxygen gas
    Ummm... Maybe I don't know as much chemistry as I thought. Requesting to not be a chemistry tutor anymore.
    Secret butt fun!

    Avatar made by this guy. I have a YouTube account and a twitter.
    In Soviet Bulbagarden, anime is butthurt over all aspects of YOU!

Page 5 of 12 FirstFirst ... 34567 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •