Homework Help

Hello! I'm a 4th year high school student. Our physics teacher required us to do a Science Investigative Research. The topic of our research was "Magnetic Fan". It's quite simple. We will use the movement caused by magnets to rotate the blade of a mechanical fan. But we have a problem. IT DOESN'T WORK! We used this design: We were hoping to get some help from the forum. Remember: the fan blade should rotate AND magnets should have a significant part in rotating it. Thanks in advance to anyone who will help us!

Hi Everyone, i have this assignment due in 2 weeks its on recreating a Model in class of the Michelson-Morley experiment to detect the aether. My first problem after a lot of research on youtube clips and just general study is, why? I understand that they were trying to prove that light needs a medium to travel therefore they were trying to discovder the actual medium it does. I did go to my teacher and asked her and she said a way to Model the experiement would be to hang a pendulum off a string have a fan blowing against it and release the pendulum each time, however im struggling to see what relevance that has with the experiment. So Could someone please tell m…

Q : In a group of 50 persons,14 drink tea but not coffee and 30 drink tea. Find: (i) how many drink tea and coffee both; (ii) how many drink coffee but not tea. i think the answer to (i) is n(T intersection C) = 30 -14 = 16 what is the answer to (ii) ? i cannot solve the question - either (a) i'm an idiot! or (b) i don't understand the question [ i don't know whether (b) necessarily imply (a) even when English is not my mother tongue] © ( this option is avoided for obvious reasons! ) so somebody plzzzzzzzzzzz help!!!!!!!!!!!!!!!!!!!!!1

Hello , I prepare my thesis whose subject is: simulation of vortex tube performance. I use a group of equations that have been referred on the thesis :''QUANTITATIVE OBSERVATIONS ON MULTIPLE FLOW STRUCTURES INSIDE RANQUE HILSCH VORTEX TUBE'', but i met some problems in the implementetion of them. Has anybody any idea about the coefficients of friction that are used in this thesis in the last pages? Thank you in advance.

Dear all, I am new to this forum and very happy to find such a community to chat with and to start with, ask for help! (I hope I'm in the right section) I was wondering if its possbile someone can help me download a book about electrophoresis from Wiley library called : Mechanisms of protein silver staining in polyacrylamide gels: A 10-year synthesis. Dr. Thierry Rabilloud*. ELECTROPHORESIS, Volume 11, Issue 10, pages 785–794, 1990 If possible, you can send it to my email: mghazaly@minapharm.com Thank you

Hello! I am, in relation to a big assignment in my school, supposed to do a comparative analysis, and two/three rhetorical analysises in relation to the cold war. I am writing about the USA-soviet relations during the period 1980-1990~. Therefore, I am looking for some material to analyze - the goal with the comparative analysis is to show a change in Reagan's opinion on Soviet, through his speech. I have already chosen the "evil empire speech" and I am currently considering "the brandenburg speech". However, I am very interested in getting some ideas for material(speeches) that could be interesting and relevant in my assignment. Cheers mnlaursen

So imagine that you have a new drug that makes humans learn better. This drug that you have can work on receptors at synaptic terminals, but does not necessarily have to. You have to determine what are the proteins that this drug works on. To prove this you need to design 5 sets of experiments that test this. Experiments can be independent or it can be one experiment that builds on itself. ----I was thinking of using fluorescent technology to show that the protein dealing with the drug is activated in brain... or maybe since the drug does not have to to work on receptors at synaptic terminals, then maybe i can use a reporter gene to …

Hi everyone ! I've got some trouble... <br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; background-color: rgb(250, 250, 250);"><br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; background-color: rgb(250, 250, 250);">IJKL is a square and [iJ] is confunded with [bC]<br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; background-color: rgb(250, 250, 250);">h is the height from A.<br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; background-color: rgb(25…

What would happen if 4-methyl-2-pentyne was reacted with ozone and water? I believe that ozone would cut the triple bond, but that's as far as I've gotten. Help please?

Hello all, this is a question I have on a practice exam. If the glucose is labeled with C-14 at the 1-position, what fraction of the isotope will not have been released after each two-carbon fragment has gone through four complete turns of the cycle? The answer: Glucose labeled in the 1-position will produce methyl-labeled acetyl CoA. After four complete turns, one fourth of the input-labeled carbon will be present in oxaloacetate. I have read the Lehninger "Principles of BIochemistry" textbook many times on how to go about reaching this answer but I still do not understand. please help!

This might sound a little odd, but I need to interview someone who is in the environmental science field. I am taking a human development class for career exploration, and I need to interview someone that is in the field of work that I am interested in. The person that I had lined up cancelled on me today, and it is too short notice to get a hold of anyone else in my area. My paper is due this Friday. I've looked around online and I'm hopeful that someone in this community would be able to give me some of their time. I'm not sure what specific field I want to go into, but so far I've come up with Park Ranger (or something along those lines) or working for Fish and Wildli…

I would be very greatful if someone could point me in the right direction. While I understand this to be the execute sequence for a PUSH in register transfer language: [AC] --> ALU --> ALUB [ALUB] --> MWB [sP] --> MAR [MAR] --> Address decoder [MWB] --> M [sP] + 1 --> SP I am unsure as to the POP instruction. Would it be the opposite of the push i.e. [sP] - 1 --> SP M --> [MWB] Adress decoder --> [MAR] or is this completely wrong. Any help would greately appreciated.

I need help finding out what the product of this equation is :H3PO4 + Ca5(PO4)3(OH) Phosphoric acid reacts with calcium hydrodixy apetite to produce.....

1. Whatis the concentration of 50 mM(milimoles) CaCl2 when expressed in %(w/v)? (Assume the Mr of Ca = 40 and Mr of Cl is 35.5) I got the RMM as 111 which i then halved and got 55.5, would I be right in thinking that it would then be 55.5% (w/v) ? Thanks in advanced for any help!

Hi everyone! I need some help with this survey for my thesis. Thank you so much! surveymonkey.com/s/5JKP9VK

hello, Im having trouble with these Stat II questions. Think you guys can help? Attached in a pdf file Thanks Paired-T.pdf

A gas is confined in a cylinder by a piston. The initial pressure of the gas is 7 bar(700kPa), and the volume is 0.10m^3. The piston is held in place by latches in the cylinder wall.The whole apparatus is placed in a total vacuum. What is the energy change of the apparatus if the restraining latches are removed so that the gas suddenly expands to double its initial volume, the piston striking other latches at the end of the process? Data known: P(initial) = 700kPa V(initial) = 0.10m^3 V(final) = 0.2m^3 My analysis: Since the gas suddenly expands (not a quasi-equilibrium process), the PV ln (V2/V1) equation cannot be used. But still, my lecturer gave me zer…

Hi guys, Here is my question/statement I need you to answer. I need the materials and procedure You have been asked to separate the contents of a barrel. The barrel contains sand, motor oil, water, gravel, small pieces of metal, and pieces of cork. Develop a procedure and materials needed to separate the contents of the barrel.

So what I did was just added the two vectors (10 i + 20j) + (-5i + 10J) and got 5i + 30j . Since a= Fnet/ m I divided 5i + 30j by 5 and got i + 6j (a). However I'm not confident about my answer because it seems too straightforward.

Question is in attachment So the formula I used was F= ma = F= mdelta v / t 10i + 20j = 5 kg(Vf-(-5i+30j)/10 I got 10i +20j = 1/2vf( -5/2i+15j) = (15i + 70j)m which is C. However the question says the object is located in the origin of reference frame and asks to find the position of the object which I don't understand how to do :/ Oh a piece of the question got cut off. The question is "What will be the position 10 seconds later"?

Construct a situation in which the attribute with smallest entropy is not the attribute causing the smallest classification error.

Hi, i would like some help on this question that was given to me for revision for my exam in a couple of days. A 20,000V overhead power line carries 50kW of power. Calculate the strength of the magnetic field at a point 12 metres away from the power line and give the unit for your answer. the value of k is 2.0 x 10-7 TmA-1 (to answer this question you will need to first calculate the current in the wire) That is what the whole question says. I haven't learnt anything like this, this year so please help me out. thanks in advance.

An air compressor is used to compress air from 100kPa and 30°C to 800kPa at a rate of 120kg/min. By having the inter-cooling feature the compression is done at constant temperature of 30°C. Calculate the power required for the compression. Known data: P(initial)=100kPa P(final)=800kPa Temperature(constant)=30°C Mass flow rate=120kg/min=2kg/s My friends applied the formula of work done for isothermal process(since the compression is done at constant temperature of 30°C): W=RTln(P1/P2) *R used is 0.2870 Their assumption is that Work(in)=Work(out). May I know what happened to the mh1 in the usual energy balance for open system? Under what condition can we ma…

Hey guys I really need help with this project I have on the biodiversity of Vietnam. If anyone knows what this means please help!: Trends in the geographical extent of selected biomes, ecosystems, and habitats. Explain anyone??

I am perplexed on a question my instructor has for me. She has given us 4 different pathways which are: 1. afferent arteriole, glomerulus, glomerular capsule,PCT, peritubular capillaries,renal vein 2. afferent arteriole, glomerulus, efferent arteriole,peritubular capillaries, renal vein 3. afferent arteriole, glomerulus, efferent arteriole, peritubular capillaries, DCT, urine 4. afferent arteriole, glomerulus, glomerular capsule, PCT, Loop of Henle, DCT, urine Which pathway corresponds to a filtered and non-reabsorbed substance? Which pathway corresponds to a non-filtered substance? Which pathway corresponds to a non-filtered but secreted substance? Which pathw…