Homework Help

Hi , Everyone! I m confuse... how to measure the electric field inside the hole? i know if it was the center of the ball, it would be E = 0, but if the condition like this i dont know. how to measure it? Thanks.

hi! this semester in my school we have to do a science project. I was thinking to explain why the sky has blue color (due to rayleigh scattering). I saw on youtube a few videos about lighting a liquid (made of chemical formulas ), but i would like to use something solid to present it. So should I make a glass with some particles inside it or something? Thank you,

So E2 dehydration reaction of primary alcohols form an elimination product and a SN2 product which was an ether. My book gives me the mechanism reaction for the E2 elimination that's happening. But before that I had read on the same book a few sections before that the SN2 reaction for a primary alcohol formed a substitution product, which was an alkyl halide! So now I am very confused as to what happens with a primary alcohol in an SN2 dehydration reaction Can someone explain? In both reactions dehydration occurs so I really don't know Does a SN2 dehydration reaction form an ether as well as an alkyl halide?

My book (essential organic chemistry by paula yurkanis bruice 3rd edition) says that primary alcohols oxidize into aldehydes and that the oxidation contiues to form a carboxylic acid. Then I'm given an example of this with H2CrO4 as the reducing agent Then I'm told that since H2CrO4 is toxic HOCl is used instead. THn I'm given an example of this ( same primary alcohol used in the reduction with H2CrO4) BUT this time the primary alcohol doesn't keep oxidizing into a carboxylic acid! Is it supposed to keep oxidizing and the book just assumes I think that or with HOCl do primary acids not keep oxidizing?

Do you know 30 elementary particles?

Can someone tell me if I'm on the right track with these intramolecular reactions? For a) I think that an epoxide is formed after NaH takes a Hydrogen from the OH substituent and then the electrons travel making the Cl leave. Then for b I know an epoxide can't form since the OH and the Cl are on the same side. I think the NaH would take the H, so would the product be a resonance structure??? For c. I think it's a 5 carbon hetero-cyclic ring with an Oxygen closing the ring + NaH2 and Br- And for d. I think another hetero cyclic ring happens but I don't know what it would look like.I don't know it's substituents or how long it would be since it's not a lon…

Ok soo hi i am kinda in a rush since i dont know how to make a LB agar dish (Made for growing bacteria like the ones on your keyboard that your maybe responding to this post with) I completely forgot to ask the seller i bought these Petri Dishes How to make them and this is going to help me with my homework i am trying to grow bacteria from a agar dish and seeing what chemicals will kill them more efficiently so i am not asking for a answer for my homework btw The Reason i am in a rush because today i bought the dish some (Pyrex 3160-100 Dish, Culture, Petri, Complete, 100x10mm 7740 Glass 12 EA/Pack for Laboratory Use Only) Completely no Clue were the seller bought i…

Hello everyone, Can you please point me in the right direction? I do not know where to start and I am in a bind right now. Thanks

For homework, I have to decide whether some objects or conditions block sunlight and their Ultraviolet rays completely, mostly, somewhat, rarely or not at all. I was given these following conditions: Water (not a bunch of water, like 1 cm deep or dripping leftover water Clothing (White Cotton Undershirt Sleeveless) Eye Glasses (The one people wear on their faces to see better) Window Glass Sun Glasses Sunscreen SPF 30 Copy Paper Ziploc Plastic Bag I'm guessing: Water - It shouldn't block any UV rays Clothing - It would probably block most UV rays Eye Glasses - Maybe some rays, like 30-40% Window Glass - It should block most UV rays but not all, …

my question partial diff equation and i need all steps question : http://www.m5zn.com/newuploads/2015/11/16/png//359d760e400a982.png

I need to know what the product of this Sn2 reaction is (CH3)3N reacting with bromoethane I thought the product would be CH3CH2N(CH3)3 but my book says it's CH3CH2N(CH3)3Br- is it a mistake or am i just not understanding

I'm studying Sn2 reactions and I know that Iodine is a weaker base and therefore a better leaving group than Br In an exercise in my book (essential organic chem 3rd edition by paula yurkanis bruice) it asks to see which is more reactive between 1-bromo-2 phenylethane and 1-iodo-2 phenylethane 1-bromo-2 phenylethane and 1-iodo-2 phenylethane look pretty much the same except that one has Br and the other has Iodine I thought it was 1-iodo-2 phenylethane because it has a better leaving group but the back of the book says its 1-bromo-2 phenylethane Does the book have an error or am I just not understanding?

In Sn1 reactions with asymmetric centers, the products are supposed to be enantiomers in the reaction in the image (which you can hopefully see. if not its a cyclopentane with a Ph and a Me attached on carbon one, the Ph is toward the front and the Me is toward the back, and the same thing is happening on Carbon 3) the products formed when it reacts with Iodine are not enantiomers, right? how can that be possible if there are assymetric centers how are they not enantiomers? I think they are but my professor said they weren't

I had to prove the following argument using 10 primitive inference rules (arrow in & out; ampersand in & out; dash in & out; wedge in &out; double arrow in & out; and 8 derived inference rules (Modus Tollens, Disjunctive Argument, Conjunctive Argument, Chain Argument, Double Negation, De Morgan's Law, Arrow, Contraposition). This is what I've come up with, would be grateful if someone could check it:

im trying to create a context free grammar over the language L = {a, b} where b is never trippled Here is what I have so far S-> X | Y X-> bbXY | aX | aY | bb Y-> b | lamda lamda being the empty letter I'm wondering if this is an acceptable solution, I guess im also not sure if b never being trippled means it also cannot be quadrupled which would make the problem easier I suppose.

I was doing a problem in Griffith's "Intro to Electrodynamics" concerning a clairvoyante and her twin brother: Sophie Zabar, clairvoyante, cried out in pain at precisely the instant her twin brother, 500 km away, hit his thumb with a hammer. A skeptical scientist observed both events from an airplane traveling at 12c/13 to the right. Which event occurred first, according to the scientist? How much earlier was it? I did it using the Lorentz transformation. I don't know if I did it correctly or not so I was wondering if someone could help me make sure I did this correctly.

Hello people.. My teacher at research methods class ask ys to write our problem statment and the research qustion I wanna show you my worke to give me your opinion, ---------------------------------------- The impact of the new electronic programs on employee performance at Arab American University The executive management at Arab American University- Jenin (AAUJ) decided to increase using the technology and new electronic programs such as Enterprise Resource Planning (ERP) in an effort to enhance administrative employee performance, who used this software program and improve quality, efficiency and data security. The massive development of the university infr…

Two wooden crates rest on top of one another. The smaller top crate has a mass of m1 = 17 kg and the larger bottom crate has a mass of m2 = 92 kg. There is NO friction between the crate and the floor, but the coefficient of static friction between the two crates is μs = 0.8 and the coefficient of kinetic friction between the two crates is μk = 0.62. A massless rope is attached to the lower crate to pull it horizontally to the right (which should be considered the positive direction for this problem). 1) The rope is pulled with a tension T = 248 N (which is small enough that the top crate will not slide). What is the acceleration of the small crate? 2.275 m/s^2 2) In…

Preamble: I hope I can post here (in the homework sub forum) since I am trying to "catch up" ** with the subject of Relativity in a way. If the universe is represented by a model consisting of the set of events in a 4D manifold , are there points in this manifold that have particular characteristics (or properties?) For example ,what does it say if events are separated from each other by the same 4D distance? Secondly the event that represents the Big Bang , would that be the event with the greatest sum of distances from all the other events? Thirdly would this event (the Big Bang) be considered to be at the "centre" of the manifold? …

How do u find the minimum parabla that has x-intercepts of -2 and 4 and passes through the point (3,-15) ? I have that the answer is -27 but I don't get how to get that answer can some please help ?

There are several possibe expansions that can be used for the Gibbs excess energy. One of them is the Redlich-Kister expansion gE= x1.x2[A + B(x1 - x2) + C(x1 - x2)2] where B=0, but A and C are nonzero. Find expressions for the activity coefficients for the excess Gibbs energy model in which γ1 is given solely in terms of x2 and the parameters A and C, and γ2 only in terms of x1, A and C.

can someone please help me work this problem? sulfuric acid solution contains 571.6 grams of water per liter of solution and has a density of 1.329 g/cm(cubed). what is the molarity?

Hi guys.. My teacher gave us an article and he want us to answer qustions like.. What the base theory on it What are the variables The relationship between variables What the research objectives How aee the hyptheses tested And many qustion What do you think guys is the best way to do my homework.. Becouse i didnt get any thing Thanks in advanced

Calculate the alignment score using the a)identity based scoring system and the b) blosum62 substitution matrix for the following two short sequences CHEMISTRYISGREAT CHIMESTRYASGREET (show work)

So I have to make a 2 page essay, and I'd really appreciate it, if someone could tell me how ALD affects the body, thall be nice. What I do know, is that it targets mostly men, due males have only 1 X chromosome. It could kill your nerve system. Proventing the body to move, while systems such as talk and seeing are also slowly killed