# What is Rearrange: Definition and 50 Discussions

The Claisen rearrangement is a powerful carbon–carbon bond-forming chemical reaction discovered by Rainer Ludwig Claisen. The heating of an allyl vinyl ether will initiate a [3,3]-sigmatropic rearrangement to give a γ,δ-unsaturated carbonyl.

Discovered in 1912, the Claisen rearrangement is the first recorded example of a [3,3]-sigmatropic rearrangement. Many reviews have been written.

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1. ### Rearrange formula and work out phase angle

so far i think Ip = 10 f = 1000hz struggling with the phase angle
2. ### Struggling to rearrange a formula to find c

I am trying to get to grips with rearranging this formula to find c Vc = Vs ( 1 -e -t/rc ) i can plug the numbers in to a point but im unsure about rearranging to create the new formula
3. ### Rearrange equations to calculate the Xpu impedance

Homework Statement [/B] Given the relationships: ##X pu =\frac{\text{MVA base}}{\text{MVA fault}}## ##=\frac{\text{MVA base}}{\text{MVA rated}}\frac{\text{X%}}{100}## ##\text{fault MVA}=\sqrt{3}\text{VIfault}## ##X\Omega=\frac{V}{\sqrt{3}}I fault## Show that: - (a)...
4. ### Solving v^2/2=gs(sin(α)+cos(α)*k): Get k with Steps

I've gotten to this point: v^2/2=gs(sin(α)+cos(α)*k) I'm suppost to get "k" from this equation can some help by showing me the steps because I'm a bit confused on how to do it.
5. ### I How do I rearrange this equation and make x the subject

equation is: k/((j+x)*^(1/2-a))+1=r/(x-1) Been spending countless hours on trying to figure a way to make x the subject in the equation and haven't got anywhere.
6. ### What are the units for the hysteresis coefficient in transformer losses?

I'm working with hysteresis losses in transformers at the moment, and I was wanting to know if there are units for the coefficient. Normally, I'd just rearrange the equation for units, below, h=ηB1.6f η=hf-1B-1.6 so it would have units JsT-1.6 However, given the power of 1.6, I'm not sure it...
7. ### How to properly rearrange formula

I tried rearranging the formula multiple times but the answers I got made no sense. The equation I have to use is a=(v2-v1)/t I need to solve for v2 v1=1 a=2.27 t=3.88 If you cold help me rearrange the formula correctly that'd be great! Thanks!
8. ### Rearranging an SUVAT Equation: Solving for Time

Hello everyone, Please can someone help me rearrange this equation to make t the subject: Relevant equations: My attempt at a solution: Thank you all for you help
9. ### Can you rearrange vectors in a set? And another misc questn.

Suppose you have a set of vectors v1 v2 v3, etc. However large they are, suppose they span some area, which I think is typically represented by Span {v1, v2, v3} But I mean, if you're given these vectors, is there anything wrong with rearranging them? Because there's a theorem- that "an...

18. ### Rearrange for x. Is this even possible?

Hi all, Homework Statement I'm working on a problem related to an MRI signal equation. Essentially I want to derive an equation that can tell me the point at which f(x) is maximum. I have differentiated with respect to x and double checked that there are no errors. But now I am stumped at...
19. ### How to rearrange this equation?

How to rearrange this equation? apparently 1/M (F-μmg)=μmg/g goes to μ=F/(M+m)g but I don't see how please help i never learned the simple maths and I am paying for it now
20. ### MATLAB Extract and rearrange data in Matlab

Hi all, I need to rearrange my data. I have an excel file with 12 columns and 2045 rows, which I transformed that into a .mat. I need to query my data rearranged as follows (cf. example matrix below): 1-sum all values of Col 3 if: a-they belong to a given value of Col 1 and to a...
21. ### Rearrange Formula to Make r^2 the Subject - Homework Help

Homework Statement I am trying to rearrange formula to make r^2 the subject. Homework Equations 0.05=(2.88/4*1*0.018)(0.05^2-r^2) The Attempt at a Solution I tried to rearrage as : 0.05^2+0.05/2.88/4*0.018 then sqr root of the answer but I don't think it is correct Please help
22. ### Rearrange this equation to make x the subject

Homework Statement I'm pretty sure we're meant to solve this using a calculator but I'd like to see if it can be rearranged to make x the subject. I've tried the usual approaches but ended up going in circles. It's part of a bigger problem which required me to find the intersection of...
23. ### How to rearrange to find the height of a hollow beam

Homework Statement i had a solid rectangular beam of max stress equalling 1.65x10^6N/m² a new beam, a hollow rectangular beam is made to reduce weight, it has the same maximum bending stress 1.65x10^6N/m² but this time has a horizontal dimension of 0.2m and a constant wall thickness of 0.02...
24. ### Need serious help to understand how to rearrange scientific formula

I am currently doing AS level physics at school. However I still can't rearrange formula for questions. I literally have no idea on how to go about doing it. For example, a simple formula like R=V/I I tried to rearrange it so I could find I. I tried using an example I found on this...
25. ### Do high power microwaves ionise water molecules and/or rearrange food molecules?

Ok, this is a separate topic about Microwaves. I have come across claim that microwaved food is safe for health as long as the food is microwaved on a low power. This is because microwaves oven that are used on high power can strip ionise a water molecule and rearraange atoms in food...
26. ### Will someone help me to rearrange this sentence ?

a) and reduce our risk of / lifestyle / By adopting a healthy lifestyle, / a healthy body / and diet related diseases / we can maintain / developing b) tissues / to create / and repair / Healthy eating / all necessary nutrients / means / supply / and abundant / of energy
27. ### How do I rearrange this equation?

[a]1. How do I make dp the subject? Q=[(dp/dx)/2k]^(1/n).[pi/(1/n)+3].R^(1/n)+3 ^= power of Please Help I also have attached the equation. Thanks M.Stephens
28. ### Rearrange Equation: Simplifying X = y / (a/b) with Help from Mick

Help, How do I get X a/b = y/x I get to: x = y / (a/b) but this seems silly? Cheers, Mick
29. ### Solve R1 in Rt = R3 + [ ( 1/R1 + 1/R2 ) ^-1 ] for Parallel Circuits

Homework Statement Rearrange formula for series and parallel circuit combination. Make R1 the subject of the formula : Rt = R3 + [ ( 1/R1 + 1/R2 ) ^-1 ] Homework Equations Rt = R3 + [ ( 1/R1 + 1/R2 ) ^-1 ] The Attempt at a Solution I am unsure as to how to get rid of the...
30. ### How can I rearrange this for the angle?

also - The result I'm getting for d is 18587 - this is when I enter 427 for initial velocity, 45 for theta, and 9.81 for g - is this correct?
31. ### How many ways to rearrange distinct objects (factorial)

Homework Statement Hello. This is the gist of the question: I have 0 < k < n and I need a formula to show the number of sets of exactly k integers, each chosen from 1, ... , n. Homework Equations n! is the number of distinct ways to rearrange n objects into n slots. The...
32. ### How to rearrange to solve for an exponential function

I am having difficulty trying to rearrange this equation to solve for one unknown variable. i=(io)exp(z*α*F*∆V)/(R*T) How would I rearrange this equation if i wanted to solve for io, also how would I rearrange this equation to solve for say α.
33. ### Rearranging Equation: Make A Subject - Ideas?

Homework Statement F = A [Q][1][Q][2] / [r][2] Rearrange make A subject any one have any ideas? Homework Equations The Attempt at a Solution
34. ### How to rearrange the equation?

I've been trying (unsuccessfully!) to rearrange the following equation so that H is the subject: mgH = [k(H - L)^2] / 2 (Where ^2 means squared.) I also have some test data which shows that if m = 50, g = 9.8, k = 40 and L = 20, H should equal 57.5, or thereabouts
35. ### Rearranging Formula: Make e the Subject | 10b + 5be - 3e + 7c

I need to rearrange this formula to make e the subject. Have I done it correctly? 10b + 5be - 3e + 7c 10b + 5be - 3e = 7c 5be - 3e = 7c - 10b e(5b - 3) = 7c - 10b e = 7c - 10b / 5b - 3
36. ### Rearranging Formula: Step-by-Step Guide to Solve ax - b = cx + d

I have been trying to rearrange this formula to make x the subject: ax - b = cx + d My (wrong) attempt at the answer was: x = cx + d/a - b I know that that is wrong because x still appears on the right side of the formula. The right answer is: x = (d+b)/(a-c) I have no idea how...
37. ### Deflection of Beams - Rearrange formula

Deflection of Beams - Rearrange formula [URGENT] Homework Statement Deflection for a simply supported beam... I calculated the deflection of it to be 9.72mm downwards, but there is a support 6mm from the original position and need to calculate the force on the support... The original...
38. ### Rearrange this formula please

Homework Statement I'm doing springs in Engineering, need to find 'n' = Number of coils, only equations I have are.. Compression (let's give it a symbol &) & = ( 8FC3n ) / Gd And K = Gd / 8C3n Thanks.. Homework Equations The Attempt at a Solution
39. ### How many ways can we rearrange the letters in DISCRETE

Hey, new member here. Been viewing this forums for a long time now and used this forum as a resource for help with homework. Anyways, wasn't sure where to put this problem. I am having trouble setting up the problem. How many ways can we rearrange the letters in DISCRETE so that the E’s...
40. ### Can't Rearrange this equation ?

Can't Rearrange this equation!?? Homework Statement I need to substitute one equation into another and rearrange for one term. I can't get the right answer! Homework Equations I've had to attach the equations as pictures I am afraid, here they are. The equation to be...

42. ### *HELP* Rearrange Equation Using Trig Identities

Hi Helpers:blushing:, the following is my problem: I have to rearrange Equation(1) to make Equation(2) using trigonometric identities (1): E(θ)=2Eo + (ΔR)^2 (c(x)cos^2(θ-θo) + c(y)sin^2(θ-θo)) (2): E(θ)=2Eo + ½(ΔR)^2 ((c(x)-c(y))cos(2(θ-θo)) + (c(x) + c(y)) I was able to get...
43. ### How to rearrange this equation for o

o = theta how the hell do you rearrange for o? (1/6)tan^2(o/2) + (1/2)tan^2(o/2) = t
44. ### Can anyone help me rearrange this quadratic equation for t?

can anyone help me rearrange to make t the subject. If you could show the working it would be a real help.
45. ### Simplify the Equation (m - M) + 5 = 5(log d) for Easy Understanding

ok i want d the subject in: m - M = 5 (log d) - 5 ok now. (m - M) + 5 = 5(log d) ((m - M) + 5) / 5 = log d d = 10 ^ ((m - M) +5) / 5) is that right?
46. ### Solve (A+Bh)/(2B + A/h)=X to Find A

Hey, I've spent ageees trying this . . . Re-arrange to find A: (A + Bh) / (2B + A/h) = X * / indicates division I would post my attempts although it would take me a while to do s and it probably wouldn't give anyone any insight. I'd much appreciate it if someone could...
47. ### Solving Kinetic Energy: How Do I Rearrange the Equation for Mass?

Hi, I know the kinetic energy equation is Kinetic Energy(J) = 0.5 x Mass (Kg) x velocity² (m/s) So how do I rearrange it. I've been having problems with it I have a question here What is the weight of an object traveling at 2m/s with 2J of kinetic energy? the answer is 10N, but...
48. ### Rearrange the Projectile Motion equation

I have a real big problem. My physics teacher has given an extra-credit assignment to my class to figure out. He said we can use whatever we want to figure it out. The problem was to rearrange the Projectile Motion equation (d = Vit + 1/2at2) to solve for t. So I started out by asking my Math...
49. ### How to rearrange this trig function?

How do I rearrange this where do I begin? y= -2sin [ 2\pi * \frac {(t+1)} {3} ] I need to state the period, amplitude, max/min, range, domain, horizontal phase shift, and vertical displacement Im not sure how to rearrange the square brackets.
50. ### How to rearrange coulomb's law equation to make q2 the subject

have been trying this for 8 hours. have finally come up with q = Fe X r squared, divided by Ke. In the problem I have been told the value for: Fe = 5.5 x 10-9, r = 5.0 x 10 -10 and of course Ke (8.99 x 10 9) known nucleus charge is e= 1.6 x 10-19. I have been asked whether the magnitude of...