Thursday

July 24, 2014

July 24, 2014

Total # Posts: 57

**physics**

an object moves from point p to q with an average speed of 60m/s and comes back from point q to p with an average speed of 144km/h . what is the average speed of whole journey in m/s?

**physics**

An aeroplane taking off from a field has a run of 500 meters. What is the acceleration and take off velocity if it leaves the ground 10 seconds after the start ?

**Chemistry**

Thank you Dr. Bob! :)I had that but it seemed too simple to be true. I didnt have my text to verify.

**Chemistry **

Write the Ka reaction for formic acid, HCO2H, and for methylammonium ion, CH3NH+ 3 . How do I approach this?

**Honors Physics- Help PLEASE- Test tmrw**

A tritium nucleus is formed by combining two neutrons and a proton. The mass of this nucleus is 9.106 × 10–3 universal mass unit less than the combined mass of the particles from which it is formed. Approximately how much energy is released when this nucleus is formed?

**Maths**

The dimensions of rectangle B are twice the dimensions of rectangle A. The area of rectangle B is 200 cm2. What is the area of rectangle A?

**Maths**

For a Chinese New Year celebration, James and Zhou are making a dragon costume similar to the one shown above. In total, the costume requires 58.6 meters of fabric. Zhou already has 11.5 meters of fabric, and James just purchased 20.2 meters of fabric. How much more fabric is ...

**Maths**

During the month of January, temperatures can decrease by 18° per week. If this happens, and the temperature on January 12th was 9°, what is the temperature on January 19th?

**Math**

Tonya took out a loan to help pay for her house. She borrowed $50,000 for 15 years at a yearly simple interest rate of 5%. How much interest will she end up paying the bank?

**SAT Essay **

Mainly directed to Mr. Pursley and Write Teacher but feel free to critique! Thank you so much. Assignment: Do you think that ease does not challenge us and that we need adversity to help us discover who we are? Plan and write an essay in which you develop your point of view on...

**SAT Essay**

Thank you.

**SAT Essay**

Please critique and let me know how it is and what I can improve. Thank you! Assignment: Do you think that ease does not challenge us and that we need adversity to help us discover who we are? Plan and write an essay in which you develop your point of view on this issue. Suppo...

**AP Calc for Reiny**

You did just fine and your second derivative is correct, if you meant (6y^2 - 4x^2)/(9y^3) except they took it a bit further. notice your numerator is -4x^2 + 6y^2 from the original 2x^2 - 3y^2 = 4 , then 4x^2 - 6y^2 = 8 , and -4x^2 + 6y^2 = -8 to get their -8/9y^3 If you were...

**AP Calc for Reiny **

You did just fine and your second derivative is correct, if you meant (6y^2 - 4x^2)/(9y^3) except they took it a bit further. notice your numerator is -4x^2 + 6y^2 from the original 2x^2 - 3y^2 = 4 , then 4x^2 - 6y^2 = 8 , and -4x^2 + 6y^2 = -8 to get their -8/9y^3 If you were...

**AP Calc**

I need to find the second derivative for this: 2x^2-3y^2=4 I understand all the steps but for some reason I get the wrong numerator. I get (6y^-4x^2)/9y^3 The answer is -8/9y^3

**AP Calc **

I need to find the second derivative for this: 2x^2-3y^2=4 I understand all the steps but for some reason I get the wrong numerator. I get (6y^-4x^2)/9y^3 The answer is -8/9y^3

**Chemistry**

Positive and negative- in the sense things should cancel and charges should inc. and dec.

**Chemistry**

What is your charge for Au? There has to be a positive and negative- check your equations- that answers then may not apply.

**Chemistry**

The first rxn is reduction. Au went from +3 to 0 so higher to lower number (became more -ve) Na is oxidized. went form 0 to +3

**Pre-calculas Math**

9pi/12 should be converted into degrees. The value of pi is 180 so all you do is 180 times 9 divided by 12 and then take the cosine of that value.

**Critiques cont'd **

So, if I spend about 5-6 minutes planning what else would I write except for a couple of bullet points about my two main examples? Would it just be this: ex1: _____ -something -something ex2: _____ -something -something Is that it? Also, I think I need help as Mr. Pursley indi...

**SAT Essay Critiques**

So, if I spend about 5-6 minutes planning what else would I write except for a couple of bullet points about my two main examples? Would it just be this: ex1: _____ -something -something ex2: _____ -something -something Is that it? Also, I think I need help as Mr. Pursley indi...

**SAT Essay Critiques**

For the essay we are only given 25 minutes, so my only planning is when i write what my examples will be. That's the only thing I write in the test booklet : ex1: _____ ex2: _____ And that's it. And also, for my conclusions- I usually don't know how to wrap it up. ...

**SAT Essay Critiques**

Mr. Pursley- You have critiqued multiple essays of mine- is there recurrent mistake that I make? What can I do to make it go from a 5 to 6? Thank you so much, I really appreciate it.

**SAT Essay**

Mr. Bob Pursley- You have critiqued multiple essays of mine- is there recurrent mistake that I make? What can I do to make it go from a 5 to 6? Thank you so much.

**SAT Essay**

comments possibly?

**SAT Essay **

Assignment: Can knowledge be a burden rather than a benefit? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, studies, experiences, or observations Essay: Knowledge can nev...

**calculus**

when you take the derivative of something for exaple y = 3x^3 +2x^2+3 it's y' = 9x^2 + 4x the equation y' is the derivative of the original equation- which was cubic- the derivative becomes quadratic.

**SAT Essay **

Assignment: Can knowledge be a burden rather than a benefit? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, studies, experiences, or observations Essay: Knowledge can nev...

**SAT Essay**

Okay thanks for feedback. Should I have given, I guess, real life examples of issues today? Also, what other sort of higher authority should I have written about? Something less than government, like maybe the school's principal, or boss at work? Thanks.

**SAT Essay **

Assignment: Is it important to question the ideas and decisions of people in positions of authority? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, studies, experience, o...

**SAT Essay**

Thank you so much sir. I have another essay to post shortly. I have trouble with conclusions. I do not know how to properly start the conclusion off. I didn't want to write , "in conclusion" or "to wrap it up" I just don't what to do for that. Also,...

**SAT Essay**

Can someone please critique my essay? Thank you! Assignment: Should people take more responsibility for solving problems that affects their communities or the nation in general? Plan and write an essay in which you develop your point of view in this issue. Support your problem...

**SAT Essay**

Can someone please critique my essay? Appreciate it.

**SAT Essay **

Assignment: Should people take more responsibility for solving problems that affects their communities or the nation in general? Plan and write an essay in which you develop your point of view in this issue. Support your problems with reasoning and examples taken from your rea...

**MATHHH!!!! PLEASE HELP**

setup a table for both trains one at x other at x+12 total distance 174 time 1.5 hours

**SAT Essay**

Thank you

**SAT Essay**

The essay is out of a six, so it's still a four with the mechanical errors?

**SAT Essay **

Assignment: Is there such a thing as success without sacrifice? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, studies, experience, or observations. Essay: It is very dif...

**SAT**

Okay thank you so much for your feedback sir.

**SAT**

May I post another essay please?

**SAT**

I also have another essay. do you mind reading it? I really appreciate you taking the time out to give me feedback. Thank you so much.

**SAT**

So, it would be better if I continued to reinforce the point that it IS IMPORTANT to move on and basically what I said in the last sentence, repeat (but in different words) throughout the essay?

**SAT Essay **

Assignment: Is it important for people to let go of the past? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, studies, experience, or observations. Letting go of the past ...

**SAT **

Can someone critique an SAT Essay that I post? I would really appreciate it. Thanks.

**SAT **

Can someone critique an SAT Essay that I post? I would really appreciate it. Thanks.

**physics 231**

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?

**physics**

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?

**physics**

An experiment was done in which different coloured light were shone onto a water plant seperately and the rate of production of oxygen was measured. which coloured light will produce the lowest rate of production of oxygen? explain your answer

**chemistry**

How many grams of NaOH should be dissolved in 1 litre of solution to prepare a solution with pH value12

**Calc**

how do I do this: given g(x)= x^2/3x+2 determine any x values for which f(x)=1/2. I really don't understand what to do.

**math**

when solving the exponential equation, 2^2x-1=16 what do I do first? do I convert to a log equation?

**MATH**

f(x)=2x^2-4x how do you find the x and y intercepts? Are these answers correct: orientation: parabola opens up Vertex: (1,-2) Axis of symmetry: 1

**Math**

is the answer 2x+h+2

**Math**

no wait...I did that wrong. I forgot a step.

**Math**

I got 8x+2h is that correct?

**Math**

How do I find the difference quotient f(x)=2x^2-4x

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