Homework Help

side length of 6 [math] \frac{6*6*6\sqrt{3}}{2} [/math]. what now? how do i do that? ps the answer is [math]54 \sqrt{3}[/math] I just don't know how to get there

Hey guys I have this question i've been trying to solve for too long: Let A be an nxn matrix, rankA=1 , and n>1 . Prove that A is either nilpotent or diagonalizable. I have no clue how to even get started with that... though i attempted too much... Anyone can help? Thanks a lot

Hello everybody. I have a big problem (it is not a homework but an important exercice) which i can't solve and i have no solution ... A circularly polarized monochromatic wave is reflected from a dielectric mirror which has parameters μ and ε. Its wave vector is k = (k0, 2k0,0). Find the magnetic field B, the electric field E and the Poynting vector S as well as the angle of incidence for which the reflected wave is linearly polarized (i.e. the Brewster angle). Calculate the energy of the system. I think we have to use this (very) general equations : B = B0.sin(ωt + δ) rot E = - ∂B/∂t E = -ωB0.cos (ωt + δ) where : ω=k.c = 2∏c/λ For the circular pol…

Hi, I know I have asked a few graph questions before but got another one that I am stuck on now The concentration of a stock standard is 4mmol/L (Creatinine). This stock standard is diluted in water to give a set of working standards which are 0 mmol/L and 0.00ml, 0.1mmol/L and 0.125ml, 0.2 mmol/L and 0.25 ml, 0.5 mmol/L and 0.625, 0.8mmol/L and 1ml, 1.0mmol/L and 1.25 ml, and 2.0mmol/L with 2.5ml vol. (The mmol/L are concentrations and the ml are volumes of the standards) The question says I have to plot this data as a calibration curve. I dont know which set of numbers i am supposed to plot and which is the X and Y axis. Then I am supposed to determine …

Hey eveyone, until now I can't figured out what is "unit vector" in term of this formula: [math] \hat{r} = \frac{\vec{AB}}{||\vec{AB}||} [/math] especially when referring to the graph, unlike one of the components that it used [math] ||\vec{AB}|| [/math], which referring to the "magnitude/length of a vector". another question, 10. Given that [math] \vec{OA} = \lambda i[/math] and [math] \vec{OB} = 2i + 3j [/math] and [math] \vec{OC} = 3i - 4j[/math]. Find the value of [math] \lambda [/math] if A, B and C are collinear. (note that i and j are the cartesian coordinates unit vector) per said that "A, B and C are collinear", I plot it like this,…

Hello friends, I have heard that drift speed of electron is very slow.But my question is then how does bulb light instantly when we switch on??? And how did one calculate the drift speed of electron in a wire??

1. An electric space heater draws 15.0 A from a 120 V source. It is operated, on average, for 5.0h (hours) each day. a) How much power does the heater use and b) At $.10 per kWh, what does it cost to operate the heater for 30 days? 2. Suppose each person in the United States uses 12,000 kWh of electricity a year and the power plants using coal to generate electricity are 40% efficient. If 1.0 kg of burned coal releases 33.0 mJ a) how much coal will be burned during a year for a family of four b) how large a pile of coal would that be (using 2620 kg/ m^3) c) how much heat is given off to the environment 3. A light bulb uses 65 watts (used for 6 hours a day) and a digital…

hello every one , i'm in my engg pre-final year and i'm intrested to do my mini project related to aerospace . my project is on how to carry light weight or delicate objects into space ? main problem here is the heavy vibrations of the launch vehicle which destoys the objects inside it . can anyone suggest me wt mechanism to be used in order to reduce the affect of vibrations on the delicate object inside it .....

For a science project after my AP chemistry test we are supposed to design a calorimeter (not bomb). For fuel we are burning a cheese puff and you can design the calorimeter however you want. I attached a crude blueprint of what we've come up with. So design is that the cheese puff is in a container with a low heat capacity such as aluminum which will dissipate the heat from the flame to the water. The co2 from the flame will rise through the copper tubing (there will be two more on the sides not seen in the 2d drawing) so some of the heat will dissipate from the co2 to the water while keeping the co2 from smothering the flame. The copper tubing will be sealed with most l…

Whenever I study the atomic structures of Atoms, one thing make me very doubtful... We all know that same charges repel each other & opposite charges attract each other. Then how in the nucleus of the atom all protons (with positive charges) remain attached with each other, instead of showing any repelling force ?

I am in an Automata, Complexity, and Compatability class, and I was given a confusing assignment question. It is question 3, the one that starts on the bottom of page 1 and runs to page 2, on the pdf document attached. I have asked others for help, but they claim that there is a typo on question 3. They claim that where it says A≅C and B≅C , the B≅C should have been B ≅ D . However, when I contacted my teacher about it, he claims that is not a typo and he meant to write that. Because of it, they claim that the statement cannot be proven. I was just wondering if anyone here could help me get started with it, if it can be proven

I am stuggling with a homework question. Can anyone help? Show that, irrespective of the dimensionality of the data space, a data set consisting of just two data points, one from each class, is sufficient to determine the location of the maximum-margin hyperplane.

I need to draw a ray diagram for a galilean telescope with one diverging and one converging lens. The converging (convex) is the objective lens, and the diverging (concave) is the eyepiece. How would I diagram this, because whenever I try I get a smaller inverted image, but when I test it I get an enlarged upright image. Images would be great!

Hey guys, Im really struggling getting my head around the math involved in these types of questions, can anyone work through it with me? Thanks, N The question I've been set is: With what frequency would the phenotype a b C appear in the descendancy when the following cross is carried out in D.melanogaster? Females a B c/A b C x Males A B c/a b C, taking into account that the recombination frequency between A and B is 0.20, between B and C is 0.15, and the coefficient of coincidence is 0.25.

Any help with this question? At time t = 0, a football player kicks a ball from the point A with position vector (2i + j) m on a horizontal football field. The motion of the ball is modelled as that of a particle moving horizontally with constant velocity (5i + 8j) m s–1. Find (a) the speed of the ball, (b) the position vector of the ball after t seconds. The point B on the field has position vector (10i + 7j) m. © Find the time when the ball is due north of B. At time t = 0, another player starts running due north from B and moves with constant speed v m s–1. Given that he intercepts the ball, d) find the value of v. I worked out pa…

Hi there cn anyone help me with my work...i'll put the question... the digit 0 to 9 be associated with the alphabets A to J as follows 0-j1-h2-a3-c4-e5-g6-i7-f8-b9-d write a matlab program that prompts the user to input a seven digit telephonenumber and then displays a list of all letters that can be formed from thenumber.for example 7848979 begins :fbebdfd, fbebddf, fbebfddsupport your work with a flow chart xfunction alpha %First we define a matrix a for the lettersa = ['JHACEGIFBD']; %Input 7 digit telephone number using 'input' function and store in matrix e for n = 1:7, b = input('\nPlease enter a 7 digit number (after each number press enter): '); …

Each capacitor in the combination shown has a breakdown voltage of 15V. What is the breakdown voltage of the combination? ...........20uF................................................20uF ----------/-------- ........10uF............------------/------------ A..........................--------/--------- .................................----------B ---------/---------.........................-----------/------------- .........20uF...........................................20uF Sorry this is the best I could do for the circuit diagram. It is capacitors between two points A and B. Full stops are there to keep the values in place they have no other mea…

i am researching whether the xbox 360's kinect will be beneficial in education. In particular the physics discipline. I need some help in answering a few simple questions to see your opinions on whether it would be effective... Background Information: One of the most important attributes that adds value to the Kinect is the quality (functionality) of the product that differs from competitors. Through 3D depth sensors and RGB camera, the product enables customers to play controller-free and transform the body to be the controller. These highly developed sensors help identify and track the user’s body motion inside the play area. (Xbox support) Further, Kinect sen…

I'm planning to enter a science competition with three or four friends, and need some ideas for a project. Here's some background information about us: Courses taken: Biology, Chem, AP Chem, AP Statistics, Algebra 2, Pre-Calculus Grade 10 Thanks!

HELLO! So I need some help guys and gals. I am doing a project in school about pretty much anything to do with new technology, and I chose to cover ferrofluids and their applications. Can anyone help me get a foothold on some good sites or blogs that would point me in the right direction? I'd greatly appreciate it

Ok, so I attend a prestigous magnet school for science, math, and applied technology. As rising juniors and seniors, each student is required to research a specific "thing" (i.e. treatment, new nanofiber, etc.) under any scientific category. The project must be able to require at least 2 years of research and must be a new research topic, never before tested. I have NO IDEA what topic i should do, but i wanted something related to electrospun nanofibers. Anyone have a suggestion?

How does heavy metal ion, such as Lead Nitrate, denature an enzyme? I need a detail description of it, up to A2 level standard.Can someone point me to the right direction to this question or give me some hints?

Just a quick question, should the Null Hypothesis be accepted or rejected? Null Hypothesis : Same concentrations of substance X & Y will have the same effect on substance Z A experiment was carried out to determine whether the same concentration of X and Y will have the same effect on substance Z. Hence 3different concentration of X & Y was made and mixed with substance Z in a different test tubes. Data was collected for each different concentration of X and Y and its mixing with substance Z. It was found, from the Mann-Whitney U test, that the two weakest concentration of X and Y did not have a significantly different effect on Z but the stronge…

Hi Everybody, I have some problems with answers for the following question - Should 13 CODIS loci be used for making conclusions about the race of potencial suspect? and another one - What are difficulties in using studies based on race? Thanks for any help!!

hello guys consider the following production rules A->Bb A->a B->Cc B->b C->Aa C->c I think the above grammar has indirect left recursion I need an equivalent grammar which is not left recursive