Homework Help

Hi I have this ideal gas rule Pv =nRT If we have p in kpa and m in mole Is sould to convert mole to kilo mole ??

why are they resonance hybrid considered to have a lower energy state than other resonance hybrid?does the delocaliazation of electrons cause?if yes then y? ..help me ASAp

Hi!!! I want to write a code in Matlab for the Backward Euler Method for 2x2 systems, using the fixed point iteration to find the yn+1. y1n+1=y1n+h*f(tn+1,y1n+1,y2n+1) (1) y2n+1=y2n+h*g(tn+1,y1n+1,y2n+1) (2) Could you tell how I use the fixed point iteration?? At (1) the fixed point iteration will calculate y1n+1, y2n+1 will be calculated at (2) but it is already used in the equation (1) ...

Just trying to get this clear, is Vdc that leaves a full wave bridge rectifier circuit the same as Vdc on the output ripple voltage of a capacitor filter?

What are the evidences that a gas is dissolved in water???

¨A certain Gas of volume 0.4 m3, pressure of 4.5 bar and temperature of 1300 C is heated to in a cylinder to 9 bar when the volume remains constant. Calculate ¨ (i) Temperature at the end of the process, ¨ (ii) the heat transferred ¨(iii) change in internal energy ¨ (iv) work done ¨(v) change in enthalpy. ¨Assume Cp = 1.005 kJ/kg.K and Cv= 0.71005 kJ/kg.K my answer p1v1=mRT 4.5 X 100 X 0.4 = m X 0.28 X 403 m= 1595 kg now i) p2v2 = mRT 9 X 100 X 0.4 = 1.1595 X 0.28 X T T = 806 K ii ) the heat transferred no heat transferred because the work = 0 ¨(iii) change in internal energy Cv(T2 - T1 ) 0.71005(806 - 40) = 54.86 ¨ (iv) …

a mixture of 4.5kg of o2 and 6.8kg of n2 has a pressure of 3.56 bar and temperature 15 degree.determine the following. 1.volumetric analysis 2.specific gas constant 3.partial pressure of 02 4.density of the mixture****** ***** can you explain me what i need to determine to find the density of the mixture???????????

A student wanting to catch fish to sell at a local market on Sunday has discovered that more fish are in the water at the end of the pier when the depth of water is greater than 8.5 metres. The depth of the water (in metres) is given by d=7+3*sin((π/6)t), where t hours is the number of hours after midnight on Friday. a. Between what hours should the student be on the pier in order to catch the most fish? b. If the student can fish for only two hours at a time, when should she fish in order to sell the freshest fish at the market from 10.00am on Sunday monday?

There are 3 alternatives of heat source. Thoose external source supplies heat for closed cycle system. * At the 200 C air as an hot source and 20 C air as cold one. * 200 C steam and 20 C water * 200 C soduim solution and 20 C solid sodium Which one should be choosed for generate power with higher efficiency. Explain theese theoretically and pratically. How can i explain this ? I think it's related with spesific heat but i couldn't explain.

1. The problem statement, all variables and given/known data 2. Relevant equations Superposition Non-inverting OPAMP: V_out = (1 + R/R)V_in = 2*V_in2 Inverting OPAMP: V_out = -V_in V_os = 2.5mV 3. The attempt at a solution 1. V_in enabled, V_os disabled V_out1 = -V_in 2. V_os enabled, V_in disabled To get V_out2, use the non inv. equation where V_in2 is equal to V_1 + V_os where V_1 is the node between R and R at the middle bottom of the circuit. V_out2 = 2*(V_1 + V_os) 3. V_out = V_out1 + V_out2 Is this the correct approach? Thanks in advance I'm pretty sure that step 2 is correct. The professor did an example in class that was similar enoug…

Hi, Why is the solubility of oxygen in blood greater than its solubility in pure water? I need to have an answer that relates to solubility, temperature and pressure. I read about Henry's law, but its not that clear to me because my teacher did not discuss Henry's law in class.

Fe(s) + 2CuCl2∙2H2O(aq) = 2Cu(s) + FeCl2∙4H2O(aq) I'm confused with the hydrates...... Are my products correct?? How to balance it??? Is it: Fe(s) + 2CuCl2∙2H2O(aq) = 2Cu(s) + FeCl2∙4H2O(aq), but the chlorides are not balanced...

I can work out these equations when the pressure and volumes are given, but I've forgotten how to do it with those that only state depth: A scuba diver inhales air at a depth of 10m and ascends to 1m, holding their breath. If their normal lung volume is 0.500dm3, to what will this expand during the ascent? I've been looking at it a while and can't work it out. The pressure decreases and volume increases as they ascend, but I don't know how to work out the factor by which the volume increases.

Hello everyone I am a biology student and in out protein seperation course we did seperation on an ion exchanger first we washed the column 10 times with the buffer and then loaded our protein sample. after loading the sample we collected the volume eluted from the column into a "wash fraction". I have no idea why we did that... what could possibly be the reason to collect this fraction? it is not for positive protein (eluted at 0 mM NaCl)... so what then? why do we do it? and what is in there? Thanks!!!!

S1 : I teach algorithms and maths. S2 : My professor teaches maths, electronics and computer science. S3 : I have a student of maths. S4 : Algorithm is a part of computer science. S5 : Maths students know computer science. What would be the chromatic number of a graph, vertices of which are the actors/entities that are involved in the sentences S1 to S5 and edges-to represent the associations/relationships amongst the entities/actors as expressed in the sentences S1 to S5 above ? (A) 2 (B) 3 © 4 (D) None of these

Hello everyone I am a biology student and in our protein seperation course we did gel filtration seperation on sephacryl s-200 column in the beginning we collected the void volume eluted from the column can someone please explain to me why we check the o.d of void volume? what could be there? also, we loaded different sample volumes - 1.5 ml and 0.5 ml what could happen if we overload or underload the column? if I load a very small protein sample, will it not get seperated well on the column? Thank you!!

Dear SFN, I need to write a short paper on the workings and usages of electromagnetic circuits in order to pass 8th Grade science, any sites outlining these concepts in light/medium detail would be appreciated. Sincerely, ProfessorDoxus (TEST SIGNATURE) ~"Communism is like, SO last decade, bro." - George Orwell I may just write my paper on electromagnets in relation to circuits (i.e. usage in Parallel/Series and how they differ.)

Hello, I attached a circuit diagram. I need to solve for the total resistance, current through I1, voltage over R6, and current through I5. I made an attempt by reducing the circuit to a simpler circuit. What confuses me is the current through I5, and whether R3 actually makes any difference to the total resistance of the circuit, because in my eyes it is as if it is bypassed by the wire carrying current I5. Help will be much appreciated. Thanks Diagram_Series_Parallel_Comb.pdf

I search on the internet about how does temperature affect the solubility of gases then I found two different answers: An increase in temperature results in a decrease in gas solubility in water, while a decrease in temperature results in an increase of gas solubility in water. The other one was vice versa of this statement. Which is correct between different ideas that I searched? I think the first is correct but I don't know how to explain it. Based on what I understand, since the temperature increases, the kinetic energy increases which result to fast moving molecules that causes the breaking of intermolecular bonds that leads the molecules to escape from th…

Single-jet Pelton wheel turbines are used to generate an electrical power of 27 MW for the available gross head of 280 meters in a hydro-electric power plant exploitation a natural water resource. Using the information provided below find the number of pelton wheels required for the task??? Relevant information: Overall Efficiency speed of the wheels, 88% Maximum Specific Speed of wheels, Ns = 40 Loss of head in pipes bringing water to nozzle, hf = 20 m Coefficient of discharge for nozzle, CD = 0.94 Coefficient of velocity for nozzle, CV = 0.97 Bucket speed / Jet speed ratio = 0.46 Rotational speed of wheels, N = 640 rev/min What I have done…

Hi!!! I need some help... The exercise is: You have to implement a data structure to represent graphs,directed or undirected,that tries to avoid the wasted space in the representation of a graph with adjacency matrix and the difficulty of searching the edges with adjacency list representation. We consider that the vertices are numbered from 1 to nverts and the exit degree of each vertex is at most MAXDEG. If deg is the exit degree of the vertex i then the neighbors of the vertex i can be saved at the matrix edge[j], 1<=j<=deg. Write a program that reads the datas from a file: if the graph is directed or undirected(1 or 0), the number of vertices (nverts),the nu…

I need to show that [latex] f: (0,1) \rightarrow R[/latex] is 1-1, where [latex] f(x) [/latex] is given by [latex] (2x-1)/(x^2-x) [/latex]. My attempt: suppose:[latex] f(x) = f(y)[/latex] Then: [latex] (2x-1)/(x^2-x) [/latex] = [latex] (2y-1)/(y^2-y) [/latex]. [latex]y(y-1)(2x-1) = (x(x-1))(2y-1)[/latex] Reducing this leads to: [latex]2xy^2 - y^2 + y = 2x^2 - x^2 + x[/latex] Of course, I need to show that [latex]x = y[/latex] but I'm not sure how to reduce this equality any further. Any ideas? Thanks

Can someone explain to me, what does Metastable isotope means? I already read the definitions on the internet but I really don't understand it. Thanks in advance.

I'm asked to prove the following inequality: (pi/6) + 1/(5*sqrt(3)) < arcsin(0.6) < (pi/6) + (1/8) and I'm instructed to use Lagrange theorem on a similar function, now I know what Lagrange theorem (mean value theorem) means, but I fail to understand how to relate it to this inequality

Hi there, I am hoping someone could help me through this: Q) During the radioactive decay of cobalt-60, a gamma ray with 1.33 MeV of energy is released. Calculate the decrease in mass (in kg) of the cobalt-60 nucleus as a result of this emission. A) 2.36*10^-30 I will ask the teacher tomorrow and reply back here with the strategy if no one knows this. Thank you.