Homework Help

Find the volume of the solid bounded by [math]z = x^2 + y^2 [/math] and [math] z^2 = 4(x^2 + y^2) [/math] My attempt to answer this question: [math] \displaystyle\int_0^{2\pi}\displaystyle\int_0^2\displaystyle\int_0^4 1 \rho^2 \sin{(\phi)} d\rho d\phi d\theta = -\frac{128\pi \cos{(2)}- 128\pi}{3}= 189.822143919[/math] Is this answer correct?

Why is i =j in the steps highlighted in green?

Hello everyone, I'm back again with another question, this time about buffer solutions. This assignment is divided into two parts, I've done the first one and I am quite confident in my answers. As for the second one, I can't see where the problem is in my calculations, but the results do not seem right to me. Here is the assignment: the objective is to make a buffer solution of 1L with pH = 8,50. Starting from 0,01mol KCN, how many moles of HCl need to be added in order to obtain the desired buffer solution, knowing that Ka of HCN is 4,8 x 10-10? What will be the variation of pH after adding 0,00005 moles of HClO4 to 100ml of buffer solution? Now as I said…

Hi all, I'm a first year biology student at university, and I've only recently started my chemistry classes. I was given an assignment on solutions and dilutions, but I'm unsure about the results I've obtained... I'm not sure if the passages I've done are correct or if this could have been done in a simpler way. Could anyone point me towards the right direction and help me correct my mistakes? Here is the assignment with my resolution and my thought process: Prepare 500mL of an aqueous solution of ethyl alcohol at 30% (v/v) and determine its molar concentration. Then, from this solution, prepare: 100mL of solution diluted 1:10 100mL of solution…

Hi there! I recently received the following task. A small block is attached to an ideal spring and is moving in SHM on a horizontal, frictionless surface. The amplitude of the motion is 0.240 m and the period is 3.08 s. a. What is the acceleration of the block when x = 0.160 m? I had difficulty solving this task. I will be very grateful for your help.

Write a program that uses the Monte Carlo method to approximate the double integral [math] \displaystyle\iint\limits_R e^{xy}dA [/math] where [math] R= [-1,1] \times [0, x^2][/math]. Show the program output for N = 10, 100, 1000, 10000, 100000 and 1000000 random points. My attempt: //Program to approximate the double integral of f(x,y)=e^xy over the //region bounded by x=-1, x=1, y=0, and y=x^2 public class montecarlo5 { public static void main(String[] args) { //Get the number N of random points as a command-line parameter int N = Integer.parseInt(args[0]); double x = 0; //x-coordinate of a random point double y = 0; //y-coordinate of a random point double…

Have a project for school that I need some help on; I'm new to the biochem. world and was hoping to see if someone could point me in the right direction. I understand that there are currently two commercial ways to detect capsaicin presence, 1.) HPLC and 2.) Scoville Organoleptic Test; my project is aiming to detect capsaicin presence right on the spot, I'm thinking something along the lines of thermochromic materials, and how they work but trying to substitute literal heat for the other heat spice.

Hello, For a high school project, I have to ask several questions to a scientist who works or worked in an English speaking country. The goal of this assignment is to understand what makes the life and the work of a scientist. Thus, if someone is interested in answering the following questions, it would be very helpful! I don't ask you to complete this homework for me, instead I'm asking for interesting content to this research assignment! This should look like an interview and this is why I prepared a few questions but you may ad whatever you find interesting or important! You can also avoid one or several questions. Questions: Can you present yourself?…

Are these above normality computations correct? If yes how? I don't understand these computations. Any chemistry help will be accepted.

My answers (a) The balanced reaction equation is 2VO2+ + 3Zn + H2O ⇌ 3ZnO + 2VO + 2H+ [math]E^{\circ}_{rxn} = E^{\circ}_{VO_2^+} - E^{\circ}_{Zn} = 1.00 V - (-0.76) V = 1.76 V [/math] (b) [math] E = E^{\circ}_{Cu} - \frac{0.059}{n} \log \frac{1}{[Cu^{2+}]}[/math] [math] E= 0.34 V - \frac{0.059}{2}\log \frac{1}{[0.10]}= 0.31 V [/math] I am working on other questions. Any chemistry help will be accepted.

Answer to question (b) assumes Maxwell-Boltzmann statistics. But how to show that the probability of each distinguishable distribution is [math]n*(N)^r ?[/math] Why is Bose-Einstein statistics impossible here? Each distinguishable distribution have equal probability of [math]\frac{r!(n-1)!}{(n+r-1)!}[/math] under Bose-Einstein statistics.

I am preparing a project paper about the scene in the movie The Martian about growing potatoes on Mars. Can potatoes be grown on Mars, and if so, what kind of process is followed?

Please read here and the answer the following questions if you know: How did the author derive the following equations? pKa = 0.09018 + 2727.92/T f = 1/(10(pKa − pH) + 1) How would you interpret the answers given by 'R' using this package? How is NH3_mgL computed in 'R' using this package? What is the denomination of total ammonia in the argument given by the author in the examples ? Is it mol/L or in grams?

Why vitamin K have 2 structures?? Why both structures have different potencies?? Actually i'm at initial stage plz guide me...

I am working on question (d) for answering it. Any chemistry help will be accepted. Do you know the correct answer for question(d)?

Are these above answers correct? specifically last one (c)?

I have two line equations representing two temperatures: Temperature 25C: y= 0.7479x + 0.6586 Temperature 33C: y= 1.050x + 1.601 I am tasked with using these to work out the difference in development rates of a particular species under each temperature. Y= development time and x=Time. I am confused with how to use these two equations to calculate the difference in growth rate. As when I apply a percentage increase calculation to temperature 33, I calculate an 87% increase over 10 hours, and with the 25C i see a 92% increase over 10 hours. It should be that the 33C has a higher development rate and so my calculations must be wrong 😕 I am very confused. Any suggestio…

a) In how many parts, we can divide an infinite plane by n straight lines of which no two lines are parallel and no three lines are concurrent? b) In how many parts, we can divide an infinite space by n planes of which no four planes meets in a point and no two planes are parallel? How to answer both these questions? What are the answers to these questions? I am working on these questions. Any math help, problem solving hint will be accepted.

Please help me

Hello community, Now, after a very long time, I have to enter a chemistry lab again. The point is to create a nutrient solution: 5mM KNO3 (potassium nitrate), 2 mM MgSO4 (magnesium sulfate), 2 mM Ca(NO3)2 (calcium nitrate), 70 μM HBO3 (boric acid), 14 μM MnCl2 (manganese(II) chloride), 1 μM ZnSO4 (zinc sulfate), 0.5 μM CuSO4 (copper sulfate), 10 μM NaCl (sodium chloride), 0.2 μM Na2MoO4 (sodium molybdate), 40 µM FeEDTA, 4.7 mM MES, 43mM sucrose How to prepare the solutions individually, eg 1 liter with 5 mn KNO3 is not a problem. But I'm a little unsure how to "combine" everything. Me…

Calculate ppt (parts per thousand), molarity (mol/L) and osmolarity (mOsm/L) of a salt solution prepped with 14.61g NaCl in .5L water. Could someone please help me with this, I am needing to understand how to calculate things like this in preparation for exams soon. I cannot afford a tutor, so any support would be much appreciated, thanks for taking the time to read this post

Hi, i'm a teacher. I'm asking myself if i have the time (milliseconds) and accelaration (milligal) from a microbit flying with a waterrocket, can i calculate the speed out of it. How would it need to be done? Should have it in m/s. Thank you!

I am doing an experiment and received much lower results for the titrated iron content when using ferrous fumarate and bisglycinate versus ferrous gluconate. It was titrated using potassium permanganate. I need to be able to: 1. List the stoich reactions for each compound when they were reacted with dilute (1.0M) sulphuric acid to create Fe2+ ions 2. Explain why ferrous gluconate gave me the most accurate iron content results when compared to the listed amount on the bottle Any insight is appreciated!