Homework Help

i have i problem with many parts to it that the forums may be able to help me with. ive been given a scenario which involves gravity surveys along a path, in summary here it is: a gravity survey is taken at an initial latitude of 45 degrees and has an azimuth of 30 degrees. ive also been given a list of gravity data readings, but its not the problem. the question asks to apply necessairy corrections and i know latitude correction is one. my problem is how to determine the correction for each reading given. i know i have to draw a triangle from the start (45 degrees) and a line going out from there 30 degrees. i have found the distance ive traveled north when i tr…

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can anyone help me figure out what type of reactions these are? not a real brain when it comes to chemistry. NaOH + HCl--> NaCl +H20 4Fe + 302 --> 2Fe2O3 CH4 +2O2 --> CO2 + 2H2 BaCl2 + Na2SO4 --> BaSO4 + 2NaCl Zn + 2AgNO3 --> 2Ag + Zn(NO3)2 2HgO --> 2Hg + O2 and explain how you come up with these. thanks

On dilution of different amts. of H2SO4 in given volume of water, why doesn't the temp. of the resulting solution not vary linearly. Thankyou .

Could someone please show me how to do this problem? Thanks in advance!

On dilution of different amts. of H2SO4 in given volume of water, why doesn't the temp. of the resulting solution not vary linearly. :

I really would like to figure out how to do this, it's the only problem I can't solve so far.. "A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.00 later." "What was the rocket's acceleration?" We are focusing on three equations: 1) v = v(initial) + at 2) (delta)x = vt + .5at^2 3) v^2 = v(initial)^2 + 2a(delta)x x = distance v = velocity a = acceleration t = time (delta)x = x(final) - x(initial)

Could someone please help me with the following problem? Thanks in advance!

How would I do the following question? Thanks!

Initially these blocks of each mass m are at rest. The tabletop and pulley does not induce friction. So when the system moves, does it accelerate at g? Do both blocks have an acceleration of g? Does the weight of the top block affect the acceleration or exert a force on the bottom block? My book says 5 ms-2 and i am puzzled.

what is the physical test to make a dry pure sample of salt from hydrochloric acid and sodium hydroxide i.e. step by step instructions please?

Hi there, I have been given a project in school which is to research and compare the sugar content of cola, diet coke and coke zero. I'm struggling to come up with tecnique(s) which could be used for this project- a titration perhaps? I'm not sure. I believe this could potentially be an interesting project if the most straight-forward and effective techinique is used. Any help and advice would be greatly appreciated

(hi,sorry for any breach of protocol since I'm knew) does anyone know a graphing software (preferrably open source) which allows you to export the 3d graph/meshes. (gnuplot does not allow you to pan your graphs nor does allow export of them.)

1. An Acid , HA has a pKa=4.7. Calculate the ratio [A-]/[HA] for the following values: a) pH=2.7 b)pH=3.7 c)pH=4.7, PH=5.7, pH=6.7 and pH=13.7 2. A buffer at pH 4.5 is made from a weak acid(HA) with pKa of 4.0. What is the ratio of [A]/[HA] in this buffer? The equilibrium equation for this buffer is HA<--> H+ + A-, Show how this buffer would act to mop up an influx H+ ions. 3. The pH increased from 5.8, the normal pH of a cigarette , to pH 6.4 by addition of ammonia. How many moles of ammonia are required to produce this pH change per cigarette (volume approx. 5ml) ? (Assume that no unprotonated ammonia will exist at pH 6.4) 4. Calculate the pH of no…

Tris is a widely used buffer in biochemistry and molecular biology research. Its molecular weight is 121.14g/mol. how many gram of Tris you need to male 1L of 1 M stock solution ? How many mL of water you need to make a 0.1 M Tris solution from 10 mL of 1M stock solution? If the 1 M Tris stock solution is labeled as 1000 X , what is the working concentration ? How many mL of stock solution you need to make 1 L of working solution? Please help me with this!!!!!

These R not The Homework Questions but anyway could you please give me any hints how to do them correctly? Thanks! 1. An Acid , HA has a pKa=4.7. Calculate the ratio [A-]/[HA] for the following values: a) pH=2.7 b)pH=3.7 c)pH=4.7, PH=5.7, pH=6.7 and pH=13.7 2. A buffer at pH 4.5 is made from a weak acid(HA) with pKa of 4.0. What is the ratio of [A]/[HA] in this buffer? The equilibrium equation for this buffer is HA<--> H+ + A-, Show how this buffer would act to mop up an influx H+ ions. 3. The pH increased from 5.8, the normal pH of a cigarette , to pH 6.4 by addition of ammonia. How many moles of ammonia are required to produce this pH change per…

what state do u get when u cool gas? i don't get it? please help me!

what state in matter do u get when u heat gas. i just don't get it!. i understand that you get plasma but what state in matter is that?!

in the past they based elements on compounds based off if they observably decomposed after heat being applied to them... how come salt was not classified as a compound and an element instead? is it because no changes that the eye could detect occurred?

A 200.0-g sample of a pure substance was composed of 131.9 g of copper and 68.1 g of sulfur. Another sample of the same substance, this time with a mass of 150.0 g, was brought to Joseph Proust to analyze. How many grams of copper and sulfur would you expect to find in the sample? What basic law in chemistry are you employing in order to make your determination? a.Law of Multiple Proportions b.Law of Combining Volumes c.Law of Conservation of Mass d.Law of Definite Composition

Given that two int variables, total and amount , have been declared, write a sequence of statements that: initializes total to 0 reads three values into amount , one at a time. After each value is read in to amount , it is added to the value in total (that is, total is incremented by the value in amount ). Instructor's notes: If you use a loop, it must be a for loop. And if you use a loop control variable for counting, you must declare it.

If this is the information given Mass of Fluorine - 5 - 9 - 11 Mass of Carbon - 3 - 7 - 8 Mass of Product - 11 - 16 - 19 Which would be the X axis and Y axis.

I need your help to answer the 2 question in the attachment. I really have hard time in organic. Doc1.doc

how would I solve this? 13^4x-5 = 6 because I thought that 13 and 6 would have had to have a common power...

solve: 3x^2(x - 7)(2x + 5) = 0 is the answer x= 0, 7 and -5/2?