Homework Help

This is my first post, so I would like to say hi to everybody. This is not exactly homework, but I thought that this was the most appropriate sub-forum... I have problems with measurement uncertainty propagation, so I was wondering how other people cope with it. This is one problem that I couldn't solve so far. We perform radon measurements, and each lasts 3 days. Let's denote the result of radon concentration with xi, and associated uncertainty with uxi. Now we need to calculate average monthly concentration, which is trivial, but also associated uncertainty, which proves to be almost impossible, for me at least. Obviously, standard deviation and standard error a…

Hi! For my biochemistry class we have an assignment to explain how a hypothetical defect of an enzyme in the Kreb cycle could decrease the overall ATP production. We get to choose which enzyme has the defect and explain how it could decrease ATP. I wanted to use aconitase and explain how it could set off a chain reaction of defects causing enzymes to not work properly. Meaning, if there is no isocitrate dehydrogenase, then oxidative decarboxylation cannot take place. Without this process that produces alpha-ketoglutarate and CO2, NAD cannot be converted to NADH. Ultimately without NADH, reoxidation of NADH and FADH2 cannot occur which is necessary to create A…

According to VSEPR theory would I be right to assume that the first image is more accurate rather than the second one as it includes the double bonds present which can’t be shown using wedges and dashes? Thanks Also when drawing a molecule using VSEPR do you show lone pairs that are not on the central atom but on another atom? Or do you only show lone pairs on the central atom and ignore the rest but include them only when drawing a lewis dot structure? Thanks

I'm taking a summer class right now. It's English Composition II, and I just today got an assignment to do a 900-1000 word explication on the poem "Conversation" by Florence Anthony (pen name: AI). Here is an exact copy of the poem that appears in my textbook: http://www.poetryfoundation.org/poems-and-poets/poems/detail/42541 However, I should point out that, in my textbook, there is a double-space between the lines "and just by accident," and "so inconsequential you barely notice it," suggesting that there are two stanzas. This is important because noticing the stanza breaks is important to my explication. This is the only stanza break in the textbook. We are…

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If you have a molecular obital diagram such as N2 like below: I know below it is the molecular electronic configuration, but was does KK stand for? Thank You

is there any similarities between enzyme linked immunosorbent (ELISA) and western blotting?

Will someone in the U.S. directly north or south of Atlanta by distance of 100 to 400 miles help my conduct an experiment to measure the circumfernce of the earth? Reply to: macconnell509@gmail.com

Jessica Johnson is a 17 year old African American adolescent who has been in a monogamous relationship with her boyfriend for the past three months. She admits to “sometimes” using condoms, but would like to be on a “different form of birth control, such as the shot or the pill”, but is concerned about gaining weight. Her current weight is 202 pounds; height 64 inches; blood pressure 112/79 and heart rate. Her last menstrual period was 32 days ago. She denies vaginal discharge, pruritis, and lower abdominal pain. 1. Identify the patient characteristics (physical, psychological, cultural, social, economic, lifestyle, etc.) that should be considered relevant to this ca…

The most part of spontaneous mutations don't occur in the phenotype because they (are): - harmful, - healthy, - dominant, - recessive, - neutral, - occur in the noncoding DNA, - include packing processes only. Neutral: the most part of mutations is neutral. Recessive: if they don't occur they are recessed. Am I wrong? The last one "include packing processes only" - I'm not sure. I'll be grateful for any assistance.

Under conditions of photochemical chlorination, (CH3)3CCH2C(CH3)3 gives a mixture of two monochlorides what is the meachanism

A) Ancestral symbionts had low GC content genomes by chance, and these low GC content genomes are passed onto their progeny. B) Replicating high G+C content genomes requires several additional enzymes, to break apart the strong triple bonds formed from GC pairs, which are rarely found in symbionts with relatively small genome sizes. C) Free-living organisms must have a more stable genome to survive; low G+C content organisms are often selected against in nature. D) Symbionts usually do not have as many…

Question options: A) Hydrogen sulfide B) Lipid bilayers C) Proteins D) RNA lipid bilayers

A) hydrogen B) nitrate C) ferrous iron D) elemental sulfur

The isolates have 16S rRNA sequences that are 97% similar and share important phenotypic traits. Their genomes have 55% of their genes in common. The isolates would most likely be _____ Question options: A) classified as individual species of the same genus. B) classified as the same species if they can mate via conjugation. C) classified as belonging to the same species. D) split into different families.

A. contain codons that bind to ribosomes during translation. B. function to transfer ribonucleotides to RNA polymerase during transcription C. Once charged with the correct amino acids, they transfer them to the ribosome during translation D. are only present in the nucleus or eukaryotes

Regulatory protein(s) present in Archaea is/are ? A) Activators that stimulate RNA polymerase activity are present in Archaea. B) Both activators and repressors are present in Archaea. C) Similar to regulation in Eukarya, Archaea lack bacterial-like regulators such as activators and repressors and use transcription factors instead. D) Repressors that block RNA polymerase activity are present in Archaea. I had thought it was what is in red, but got it wrong. Can someone po…

a subcommittee of three people is to be chosen from a committee of 10. (i)how many subcommittees are possible? (ii)how many subcommittees are possible if two particular people on the committee refuse to work together on the subcommittee? (iii)if the subcommittee is chosen at random what is the probability that the two people who refuse to work together will both end up on the same subcommittee i can work out the first question it is 10nCr3 which gives a answer of 120 but i cant work out the rest of the question

Hi guys, Thanks for reading this topic! I would like to ask for some advice on what happens with activated carbon filters, or why you think this is. I was doing an experiment, using an activated carbon filter - Brita Water Filter (for drinking purposes), and running contaminated lake water through it. I tested the pH of the water after, and it was basic - a reading of 6.0, compared to the 7.5 of the lake water before. Why is this? Thank you! Ah sorry, I meant acidic

(AFA) The figure below shows a container that is 95% volume occupied by a liquid, initially at 10 ° C Since the linear expansion coefficients of the container and volume of the liquid, respectively, equal to 1.7. 10^-5 ° C^-1 and 5.8. 10^-4 ° C^-1, it can be said that the a) container is completely full at 110 ° C. b) empty part of the volume does not change. c) the container will be with 98% of its volume occupied at 110 ° C. d) container will only be completely filled to 220 ° C. Desde já, obrigado!

given the differential equation dy/dx=y cosx find the general solution given that y=2 when x= π /6 i cant solve this

Solve the differential equation ydy/dx =x+xy^2 given that y = 0 when x = 0. i can get down to here but then i get stuck dy/dx= x(1+y^2)/y ∫▒y/(1+y^2 ) dy=∫▒ x dx i dont know how to integrate this?

What is the effect on the acetylcholine concentration in the synapse after administration of an acetylcholinesterase inhibitor?

why the compund following give(s) white precipitate with aqueous AgNO3? can any tell me the mechanism , please..

Hello, I have to produce RABBIT POLYCLONAL ANTIBODY against mouse IgM. I also need that antigene (from the first part) to be good for mice B lymphocytes stimulation but there must not be cross reaction with rats, sheep, donkeys and goats immunoglobulins. How would I perform this task? Thank you