Homework Help

i m not able to solve this problem so can someone help me please Q)A pendulum of length 2 m left at A When it reaches B,it loses 10% of its total energy due to air resistance. The velocity at B is: A)6 m/s B)1 m/s C)2 m/s D)8 m/s please help me Thnx in advance please reply fast

Hello everyone my name is Jay and i m 16 year old and this is my first post i m not able to solve this problem so can someone help me please the question is as follows:- Under the action of a force,a 2 kg body moves such that its position x as a function of time t is given by x=t3/3,where x is in meters and t in seconds.Work done i first 2 sec is?? a)1600J b)160J c)16J d)1.6J please help me with it Thnx in advane i m not able to solve it

hello i need help in solving this Q)If the speed of a vehicle increases by 2 m/s,its kinetic energy is doubled,then original speed of the vehicle is a)(sqrt of 2 )+1 m/s b)2(sqrt of 2 -1)m/s c)2(sqrt of 2 + 1 )m/s d)sqrt of 2 (sqrt of 2 + 1)m/s sqrt is square root of please help me out Thnx in advance

Good night, I´m trying t o learn by myself a little about formal logic, but it has been difficult. I understand what are the logic rules involved but I don´t know how to solve problems. For example, I don't know how to solve this: 1. (F∨E)→~D 2. S∨D 3. E ∴ S It seems easy, but I don't even know where to start. If someone could help me, I would be very grateful. Thanks. PS: If you could validate it with this checker, better yet it's proof #3: http://www.poweroflogic.com/cgi/Proof/checkprf.cgi?exercise=8.1C

Hi, Can anyone give me an example of each of the type of mutations. I have tried researching but im getting more and more confused. Insertions Missense mutation Nonsense Splice site I know the diseases with deletions and microdeletions, and repeat amplifications, but not sure about these ones. Also, would you consider huntington disease as a trinucleotide repeat amplification or insertion/deletion ? Please help !

2 metal disks are welded together. One has a radius of R1 = 0.025m with a mass of m1 = 0.80kg and the other has a radius of R2 = 0.05m with a mass of m2 = 1.60kg. A light string is wrapped around the edge of the smaller disk. At the end of the string is a block with mass mb = 1.50kg. The block is released y = 2.00m from the ground. What is the speed of the block just before it strikes the ground? U(1) + K(1) = U(2) + K(2 U(1) + 0 = 0 + K(2) U(1) = mbgy K(2) = (1/2)mb(v^2) + (1/2)(I)(w^2), where I = (1/2)(m1) (R1)^2 + (1/2)(m2) (R2)^2 = 0.0025kgm^2, and w^2 = (v^2)/(R1^2). mbgy = (1/2)mb(v^2) + (1/2)(I)(w^2) 2mbgy = mb(v^2) + (I)(v^2…

When I apply the formula I get: (1+0.04/4)^(4/1) -1 = 0.004. Like I don't even know when we need to change the APR to the EFR I usually just divide the interest rate and multiply the exponent by the same value

I thought it was (1+01)* but apparently it's not since L((0+10)*) defines all expressions where 1 is followed by 0, I thought that the complement was all expressions where 0 is followed by 1.

Show 3 computers, using diagram with different number of data channels, address channels and bit allocation to op-code field and contrast the followings: number of different commands that different computer could issue number of different addressable locations that computer could access data transfer rate per fetch for the different computers length of the instruction register of the different computers

Solve the following system of linear equations. a) [latex]2x-y+z=1[/latex] b) [latex]4x+y+z=2[/latex] c) [latex]x-y-2z=0[/latex] The y's cancel in equations a and b to give e) [latex]6x+2z=3[/latex] The y's cancel in equations b and c to give f) [latex]5x-z=3[/latex] I now multiply f by 2 and add it to equation e to eliminate z giving me [latex]16x=7 \Rightarrow x=\frac{7}{16}[/latex] Now I plug [latex]\frac{7}{16}[/latex] back into equation f giving me [latex]5\left(\frac{7}{16}\right)-z=2 \Rightarrow \frac{35}{16}-2=z \Rightarrow z=\frac{3}{16}[/latex] Then finally I plug x and z back into equation b giving me [latex]4\left(\frac{7}{16}\right)+\fr…

List the gamates that be produced by a potato head with the following genotype TtDdLl. Keep in mind that D and L are linked, as well as d and l. I need some help with this. Do I use the 2 n rule?

Good day! I am a 4th year Honour's student at the University of Ottawa as part of the Fortin lab group. This is my first post to this forum and I thank you for reading my post - and hopefully fielding it as well! At the present time, I am currently conducting some Geochemistry work as part of my cross-disciplinary Honour's project but, as a biomedical and medicinal chemist by training, I have not had any formal practice in programs such as PHREEQC. From my research online, it is clear that this may be a forum where I can get an answer to my problem! I believe my situation may be a simple one to comment on and fix. As a complete novice to the progra…

10.0 g of Zn powder is added into a solution of silver nitrate, AgNO3. The total mass of the metallic solid recovered at the end of the reaction is 12.32 g. Assuming that the reaction did not go to completion, how many grams of Zn did react? So the equation I got what Zn (s) + 2AgNO3 (aq) -> 2Ag (s) + Zn(NO3)2 (s) I think the zinc nitrate is solid because the question asks about a metallic solid. Then, 12.32 g X 1 mol/189.41 g Zn(NO3)2 = .065 mol Zn(NO3)2 Then to find the original Zn, .065 mol X 1 mol Zn/1mol Zn(NO3)2 = .065 mol Zn .065 mol Zn X 65.39 g/1 mol = 4.25 g Zn But the answer should be 1 g Zn. What did I do wrong?

One gram of an element M combines with 3.9 g of chlorine. It forms an oxide with the formula M2O3. What is the element? a. Li b. Fe c. Al d. B e. Au What I'm confused about is how the grams impact the problem. I tried doing it without considering the grams and got it wrong, so I know they do something. Then I tried it like this. Chlorine has an oxidation of -1 and oxygen is -2 and because there are 3 oxygen atoms in the molecule, that means that the total charge on the oxygen is -6 which means that M must have a charge of +3. Aluminum is the only choice that has a charge of +3, but then what is the point of the first part of the sentence?

Hello everyone. My name is Chase and I'm here to get some help with my math. I have the following problem. Solve the following system of linear equations: 1) 2x-3y+z=0 2) x+y+z=1 3) x-2y-4z=2 From what I have learnt in my book. I can take two of the equations and get rid of a variable, then I need to take two more equations and get rid of the same variable. This is what I have so far. I take equation 1 and 3 and multiply the first by 4 1) 8x-12y+4z=0 3) x-2y-4z=8 This gives me 9x+14y=9 Now I take equations 2 and 3 and multiply equation 2 by 4. 2) 4x+4y+4z=4 3) x-2y-4z=2 This gives me 5x+2y=6. Now if I understand I now need to take these…

Hello everyone A problem given in my maths book, translated in logical notations: [math]\left(A,\neg(B\lor C)\right)=5[/math] [math]\left(B,\neg (A\lor C)\right)=5[/math] [math]\left(A\land B\right)=4[/math] [math]\neg C=14[/math] [math]\neg (A\lor B\lor C)=1[/math] [math]\left(C\land A\right)\geq 5[/math] [math]\left(B\land B\right)\geq 10[/math] Asked: [math]\left(C,\neg (A\lor B\right)=?[/math] [math]\left((C\lor B),\neg A\right)=?[/math] [math]\left(A\land B\land C\right)=?[/math] Now I've found something, pretty stupid (using a venn-diagram): [math]\left(C,\neg (A\lor B\right)=0[/math] [math]\left((C\lor B),\neg A\right)=15[/math] [m…

I am stuck! Please help! - Ryan

Gas streams are often cooled either by expansion through a throttling valve or in a turbine. to measure the relative efficiency of these two processes, the term Kh/Ks is often coated. The throttling coefficient is defined as Vh = whereas the isentropic coefficient is Ks = Calculate for CO2 at 319.4K over a range of reduced pressures from 0.1 to 2. What conclusions can you draw? Also, determine the compressibility factor over the same pressure range at 319.4 K. Use the peng-robinson equation of state in your calculations. For CO2 , T-C=304.2K, Pc=73.76 bar .

-If he dark color allele is recessive and if the population is in equilibrium, how many light colored alleles are there in the collecting site? Total=80 Light= 37 Dark=43 I got 54 but it was wrong.

The part for(int i=1; i<n; i++) { x=sqrt(y*i); cout<<"x"<<i<<": "<<x<<endl; } isn't working wll, for some elements the result is non, i thought that i because the numbers are complex, but not with include complex i get the same resut.. can anyone help me #include<iostream> #include<math.h> #include <complex> using namespace std; int main() { int n,elem[20]; float y[20],A[20]; complex<float> x[20]; cout<<"Number of elements?"<<endl; cin>>n; cout<<"Insert elements:"<<endl; for(int i=0; i<n; i++) { cin>>…

So i have to write a c++ program for the Graeffe's square root method I have am stuck here when i have this formula transform into c++ code, the formula is on the link The code works particulary, the (elem[j-1]*elem[j+i]) doesn't work, it's beeing ignored and i don't know why... can any one help me? http://latex.codecogs.com/gif.latex?A_{k}=a_{k}^{2}+2\sum_{s=1}^{k}(-1)^{s}a_{k-s}*a_{k+s},&space;k=0,....n cout<<"How many elements?"<<endl; cin>>n; cout<<"Insert x:"<<endl; for(int i=0; i<n; i++) { cin>>elem; } C[0]=pow(elem[0],2); for(int j=1; j<n; j++) { C[j]=pow(ele…

Hello, I have been reading about the acid-base equilibrium in water. I dont understand what my book explains however. The theory may be information lacking(in my opinion). Because Ive read it so many times I just decided to rewrite everything exactly from my book! I also "rewrote" 2 examples after the theory. I am also confused about what they try to accomplish in the examples. I figure they try to set up the reaction of the acid-base equilibrium in water. In the second example they marked H3O+ & OH- in red, I dont know what that means though. Then next to "simplified" they let H3O+ react with NH3. How do I know whether H3O+ reacts with NH3 or with OH-? And why is i…

Nutrients are always transported through phloem downwards right? But in this case, the answer given is D sugars upwards. Why is it upwards instead of downwards ? Does the water in this case going upwards too? I am a little bit confused. Hope to get some explanation. Thanks )

Hello i m in 11th std and need your help in chossing an evs project since i m not able to find anything good Every suggestion will be appreciated Thank You

A population consists of 10,000 bacterial cells. It is treated with a sterilizing agent. The environment with this population becomes sterile in two hours. What is its D-Value? I'm struggling with this question because I thought that in order to get the correct d-value, you needed to have a temperature. ?? Is this not correct? I don't know how to go about solving this problem without that information. Any help??