Recent content by lcary
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Why is there starvation in human populations?
One factor I'm sure that's a tiny bit involved is the fact that birth control products such as contraceptives and other services are not as available to people of the lower class demographic. I think what's more involved is that for some families the dynamic of parent child roles are difference...- lcary
- Post #59
- Forum: Biology and Medical
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Finding concentration of Permanganate
Thank you for replying. I wasn't entering in the correct number of significant figures, once I corrected for the error, I got the right answer.- lcary
- Post #4
- Forum: Biology and Chemistry Homework Help
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Finding concentration of Permanganate
Homework Statement Calculate the KMnO4 concentration of the solution in the cuvet. The Solution in the covet was made by mixing 5.00 ml of 1.00 M H2SO4 and 1.00 ml of the stock 2.00x10-3 M KMnO4. Homework Equations m1v1=m2v2The Attempt at a Solution I've tried using the dilution formula...- lcary
- Thread
- Concentration
- Replies: 3
- Forum: Biology and Chemistry Homework Help
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Calculating Molality of a Sulfuric Acid Solution
Molality means moles solute over kg solvent but it did not say the solution was aqueous, so do not assume the solvent is water. Assume 77g in 100g solution. 100g-77g=23g solvent. Convert to kg solvent. Last step would be to convert the 77g sulfuric acid to moles using the molecular weight from...- lcary
- Post #3
- Forum: Biology and Chemistry Homework Help
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Graduate Need advice applying a logistic regression to model school data
To determine whether schools are increasing the amount of students meeting or exceeding standards, I obtained a MEAP database reporting the amount of students that scored in the met or exceed standards range during years 2005-2009, for grades 3-5. I then graphed the data for using numbers...- lcary
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- Data logistic regression Model Need advice Regression School
- Replies: 1
- Forum: Set Theory, Logic, Probability, Statistics
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Force Homework: Find Force to Move Raft in Desired Direction
Homework Statement I need help solving this force problem: Two crewmen pull a raft through a lock. One person is pulling from a 45 degree angle above the horizontal and the other is pulling at a 35 degree angle below the horizontal with a force of 130N. the middle of the boat (laying...- lcary
- Thread
- Force
- Replies: 1
- Forum: Introductory Physics Homework Help
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Position vs. Time graph equation
I just completed a lab on the acceleration due to gravity and I have to answer a few questions about my data. Before I share what I am confused about I will give a quick run through of the lab procedures: --First I used a spark timer to mark a strip of paper with a clamp...- lcary
- Thread
- Graph Position Position vs. time Time
- Replies: 1
- Forum: Introductory Physics Homework Help