Search results

Hi! I'm looking to buy a new desktop computer and before I go an blow all my well earnt savings, I want to make sure I'm getting a machine which will fulfil my needs comfortably. I study Mining Engineering so most of my computing has been dedicated to heavy Excel usage (everything from basic...

Hi, I've just finished the 1st year of my Mining Engineering degree at Adelaide Uni and I have the opportunity to do a double degree with Maths and Comp Sci with a major in Applied Maths which would add an extra year to my degree. I'm not overly concerned about whether I have the aptitude to...

Hi, This is one of the question on my dynamics assignment and i've tried a number of ways and it's always wrong. This is the question: A piece of string PQ passes over a pin as shown. For the instant shown the point Q is moving straight down. The length of string from the pin to P has the...

Hi everyone, This is probably the most basic question to ask but I haven't done any rectilinear motion in 2 years and I'm so rusty, especially since all the theory and examples presented so far are in the context of DE's given to us. The question is : A train travels between two stations 2.9...

Polynomial P(x)=x^4+ax^3+bx^2+cx-10 with real coeff, has 2 integer zeros p and q. If p(x) has complex zero k-i where k is an integer. Use this zero to obtain a real quadratic factor of p(x) state all possible values of k for which this quadratic is a factor of p(x) Using p and q write...

Could someone please summarise the reactions of cyclohexane and cyclohexene with concentrated sulfuric acid. Equations, what i would see (colour change, heat) and whether a water soluble product is formed. If anyone could provide urgent assistance it would be greatly appreciated. Thanks.

Can anyone please provide assistance with the following related rates questions? 1. For the given mass of gas in a cylinder pv^1.5=400 where p is the pressure in Nm^-2 and v is the volume in cubic metres. If the pressure increases at 3Nm^-2 per minute find the rate at which the volume is...

R=5cosx(5sinx+√(25sin^2x+39.2) )all divided by 9.8<!-- google_ad_section_end --> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p> <o:p></o:p> I've got to use this formula to investigate the angles which produce the maximum range as the height of projection...

I am experiencing difficulty getting an appropriate graph when entering the following function into my Texas Instruments TI-83 plus calculator: y=(5cosx(5sinx+sq.root(25sin^2(x)+39.2)) /9.8 *where x=angle pheta If anyone could suggest the best combination to enter this function in order to...

The function given is: y=cosec(x/2)-b (0<x<2П), (0<y<5)<Y<5)<Y<5)< font> 1. Find a and b given that the points (П/3, 2) and (П,0) are on the curve and substitute them into the model function. I need help with this urgently. Please. Any assistance would be greatly appreciated.

The wine glass bowl may be modelled by the following .y=cosec(x/2)-b (0<x<2*), (0<y<5) 1. Find a and b given that the points are on the curve and substitute them into the model function. 2. Show that the function in part 1 is symmetric about x = π. (Use , for symmetry about x = a) 3. Draw...

I don't whether this is the right section as I'm in SA doing the SACE and our general headings are quite vague. We don't have any access to forums like these (God! We are so backwards here!). So any help would be appreciated immensely.:) When 3 g of the rocket-fuel dimethyl-hydrazine...

I'm not sure if Linear Equations are part of the Ext.2 course but I would appreciate it if anyone in this forum could help me with the following questions. 1. Ernst Macdonald had a farm with cows and chickens. His animals had a total of 42 heads and 124 legs. Write down a system of linear...

Hi, I am having some problems with some polynomials questions which I was absent for when they were covered :confused::burn: :eek: and now my teacher has been away ill and hence, has been unable to help me. If anyone could help me I would greatly appreciate it. :) 1. Find real numbers a and...

Hi. I am a South Australian student currently doing my SACE Certificate. I don't know how similar our advanced maths courses are but hopefully someone here can help me. I am doing a project where I have gotten to a certain point in the second question and I can't get any further. The question...

Does anyone know of any good websites which provide the relevant physics of a DVD burner/writer. I've been looking for ages but it all seems to be technical specs which have no relevance (ie. writing speed etc) Any help would be greatly appreciated.

Any help with the following question would be greatly appreciated. Calculate the enthalpy of formation of hydrated magnesium chloride solid. Mg + Cl2 + +6H2 +3O2 -----> MgCl2.6H2O The following information is needed to calculate the answer. H2 +Cl2 +aq --------> 2HCl...

I know the basics about flame colour for Sodium metal when heated on its own but I am wondering if there is any difference in the explanation when its a Sodium compound eg. (NaCl).

Hi I need help with the following questions: 1. What two purposes does a bleach serve when it is used in the laundry? (I have only got that the bleach decolourises stains to a colourless substance via the oxidising action of the hypochlorite ion) 2. The formulation used in an automatic...

Hi I need help with the following questions: 1. What two purposes does a bleach serve when it is used in the laundry? (I have only got that the bleach decolourises stains to a colourless substance via the oxidising action of the hypochlorite ion) 2. The formulation used in an automatic...