Homework Help

We have another debate - and again, we have the slightly harder side. My team and I were wondering if anyone here had any ideas? The motion is that "Organ Donations should be prioritised to those who have had a healthy lifestyle." We're negating. That is - we're saying that we should give organs to those who need them the most and NOT to those who lead "healthy lifestyles" We're thinking of arguing it from a slightly moralistic perspective. Does anyone have any ideas at all?

hey, just need some help here this for some school assignment. We made our own Solder by melting tin and lead in the correct ratio. Now we need to remelt the Solder to find its melting point. Look i now this might sound stupid, but what is the most accurate method of findng the melting point. this is very impotant, there are 2 questions about it that pop-up in this in this assignment: 1> Suggest a suitable technique and sound experimental practise that should be used so the reasonably low melting point can be accurately measured and confirmed 2> What changes did you make to the procedure in this experiment in an attempt to gain more accurate results. (It i…

Four point charges, each of magnitude q are located at the corners of a sqaure with sides of length a. Two of the charges are +q and two are -q. The charges are arranged in one of the following two ways: 1. The charges alternate in sign (+q,-q,+q,-q) as you go around the sqaure. 2. The top two corners of the square have positive charges (+q,+q) and the bottom two corners have negative charges (-q,-q). a) Which case will the electric field at the centre of the square have the greatest magnitude? b) Calculate the electric field at the centre of the square for each of these two cases. I really have no idea for the parts of this question. Can any1 give me any star…

"A point charge q = -0.35nC is fixed at the origin. Where must an electron be placed in order for the electric force acting on it to be exactly opposite to its weight? (Let the y axis be vertical and x axis be horizontal)" [ans: 240km above q] my question is, i've found 240km using coloumb's law...but im not sure about the direction...how com the answer is 240km "above q"??

If 50.75g of a gas occupies 10.0L at STP, what will be the volume in L occupied by 129.3 of the gas at STP?

hi, could someone that has done gcse mathematics coursework or similar tell me or point me in the right direction of the advantages and disadvantages of using the mean and median? thanks

how does osmoregulation (the process) function in living osmoregulators and osmoconformers, and why is it important to these organisms? What factors affect osmoregulation other than salt/ solute concentration? oh.. and how does osmoregulation affect body volume? THANNKS!

) The standard reduction potential for Zn+2 is -0.76 V. Calculate the voltage of the following cell at 25°C. Zn|Zn2+ (1.0M) || H+(0.001 M), H2 (g,1.0 atm)|Pt

Chamber A and B are seperated by a semi-permeable membrane. Chamber A contains 2.1 M NaCl and chamber B contains 9.5 M NaCl. If Na+ is in equilibrium across the membrane, what is the electrical potential differene? What side of the membrane is electrically positive? Nernst Equation for sodium E(Na) = 61/(1) log 145mM/ 15mM = 60.1 mV 1 is valence 145 extracellular concentration 15 intracellular concentration Any help would be appreciated

with the equilibrium constant, when K<1 the reactants are favoured, when K>1 the products are favoured but when K=1...what happens? also, does any1 know whether the terms "carbanion" and "carbocation" refer to a whole molecule or just to the C in the molecule?

Ka for HF is 6.8x10-4. Calculate the pH of a 0.35 M solution of HF? i dunno how to do it

Kc for the following reaction at 25C is 4.8x10-6. Calculate the equilibrium concentration (in mol/L) of Cl2 (g) if the initial concentration of ICl (g) is 1.33 mol/L. There is no I2 or Cl2 initially present. 2ICl(g)=I2(g)+Cl2(g) Thanks in advance.

Heya everyone This year I have to do a physics investigation for coursework for the OCR "Advancing Physics" course. It has to be a unique investigation just based on something of our choice, not just a typical school experiment, but I really can't think of anything exciting that is faesible with our school's resources. If anyone could give me any suggestions that would be really appreciated. I'd really like to do something on electricity or magnetism or possibly optics. The standard is one year before degree level, so it doesn't really need to be that complex. Some of the examples they gave were pretty lame, like measuring the strength of human hair, but I'd like…

I'm facing a bit of a dilemma - I'm in the school debating team and I usually quite enjoy it because they give us interesting topics that can be argued from both sides with relative ease once you really think about them. However, this time they decided to give us the topic "That We support the measures used at Guantanamo Bay". Abiding by Murphy's Law, we got the honour of having to affirm the moot. Thus, this is my lowly plea for help... anyone have any ideas?

What are the bond orders in H2, H2+, and H2- respectively based on molecular theory thanx guyz

hey does any1 know that out of acyl chloride, amide, acyl anhydride, ketone and ester...which one won't undergo hydrolysis? do carboxylic acids and their derivatives always undergo hydrolysis? thanx

Calculate the activation energy of a reaction that has a rate constant of 4.41x10-3s-1 at 78C and rate aconstant of 9.79x10-2s-1 at 315K thanx for help

please balance the following redox reaction in acidic solution: HClO2 + MnO2 -> Cl2 + MnO4- Thank you!!!

The half-life for a certain first order reaction is 13 minutes. If the initial concentration is 0.085M, how many minutes will it take for it to decrease to 0.055M

1. the radius of an argon atom is 4.2e-8 cm. What percent of the total volume of a 1 mol sample of argon gas at STP is occupied by the argon atoms? [0.83] im really stuck on this one! 2. calculate the P[total] in atom for a mixture of 3 gases that have partial pressures of 72cmHg, 400mmHg and 0.65mHg respectively.[ans:2.33] dont i just add those up and then divide by 760 to change to atm?? coz that doesnt give me the right ans. 3. A volume of 10cm^3 each of O2 gas and CO gas at STP are mixed in a 20cm^3 container and allowed to react at constant temperature to yield CO2. Calculate P[total] in atm after the reaction is complete. [ans: 0.75] i thought P1…

hey could i have some help on how to do this question? Thanks Sarah

a projectile is fired from the top of a 40m tower at an angle of 60 degrees above horizontal hits the ground at the point 100 from the base of the tower. find the speed at which the stone was thrown? find the speed of the stone just before it hits the ground?

I need some help with the theory section of my biology coursework on catalase (an enzyme). I need to make a QUANTATATIVE PREDICITON. THIS IS WHAT I HAVE SO FAR: So far I have wrote about the 10 degree rule Quantitative prediction I predict, in quantitative terms, that at every ten degrees Celsius increment the reaction rate will double. This is based on the activation energy needed to start a reaction. The activation energy is the amount of energy needed in a collision for hydrogen peroxide and catalase molecules to start a successful reaction. If this energy is not reached by the molecules, a reaction will not take place. In most cases, the majori…

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The diagram below shows a block of mass m=2.0\; \rm kg on a frictionless horizontal surface, as seen from above. Three forces of magnitudes F_1 = 4.0\;{\rm N}, F_2 = 6.0\;{\rm N}, and F_3 = 8.0\;{\rm N} are applied to the block, initially at rest on the surface, at angles shown on the diagram. View Figure In this problem, you will determine the resultant (total) force vector from the combination of the three individual force vectors. All angles should be measured counterclockwise from the positive x axis (i.e., all angles are positive). this is the question Calculate the magnitude of the total resultant force \vec{F}_{\rm r} = \vec{F}_1+ \vec{F}_2 +\vec{F}_3 acting…