Test Definition and 1000 Threads

Hello! I have a question about seat belt force. In a 55km/h collision maximum chest acceleration is 60 g, and if say torso weighs say 40kg, then max force should be 600 m/s^2 * 40kg, which equals a lot, but if you look at test data of seat belt force it is only 8KN which is strange, compared to...

Homework Statement I attached a file that includes the author's solution, and some of my work. Homework Equations The Attempt at a Solution

Homework Statement This is an introductory programming class for Engineering majors. So I am making a simple game. It requires that you enter say, 3 numbers, then test to see if the sum of the numbers is even or odd. If it is even you win, odd, you lose. The game repeats several times, and...

Hi, I want to know what is the best way to study for math test? Thanks

Homework Statement I attached the problem Homework Equations The Attempt at a Solution When I try to apply the nth-term test on the sequence, (-1)^n+1, I get an indeterminate form; so, I try to raise e to the ln[(-1^n+1)], but I run into the same problem. How do I take the limit...

I was just wondering for the limit comparison test does it matter which function is on the top and bottom?

Homework Statement We say that the displacement of a particle is a vector quantity. Our best justification for this assertion is: A. displacement can be specified by a magnitude and a direction B. operating with displacements according to the rules for manipulating vectors leads to results...

Homework Statement I attached the infinite series the question provided as a file. Homework Equations The Attempt at a Solution I deduced the general term to be ln(n)/n, so the infinite series would be written as [SIZE="4"]\sum_{n=2}^{\infty} \frac{\ln(n)}{n} I took the...

Homework Statement [SIZE="3"]\sum_{n=1}^{\infty} \frac{1}{2^n} Homework Equations The Attempt at a Solution Could I some how manipulate this to fit a geometric series, so that I may instead use the geometric series test?

unfortunatly I failed my first physics exam. I have to go back through and correct the ones I missed. I need some help on the ones I am stuck on. any help and explanations is greatly appreciated. 1.) three blocks are being accelerated upward by a force applied to the bottom block. the mass...

Homework Statement I have to do the following practical, but I am unsure of how to calculate one of the variables. We are doing this test and we are given this information to calculate E. I have equations on how to calculate R and I, but I am not sure how to calculate M. It's...

1. Homework Statement [/b] 1. Charge A (-2uC) is 0.10m left of charge B (+3uC), with charge C (+4uC), 0.075m below charge B, forming a right angle triangle with the right angle at B. Find the net electrostatic charge on C if its confusing the 0.10 is the opposite of the hypotenuse with the...

Hi there, I'm quite interested in propositional logic. Can anyone point me to a document out there (preferably from a university website, e.g. a lecturer/Professor etc. of Philosophy's personal webpage) that explains, in a clear manner, how to test for validity using the Reductio ad Absurdum...

Hello all. I am performing chemistry experiments and recording the times of various observed results. What I am doing currently is performing the test several times in order to determine what result is "normal." My goal is to determine a range as a standard by which all future tests will...

I want to know how prospective is the field of PTE (Product and Test Engineering) compared to IC Design Engineers? What good may lie in future in this field? Also, how much digital/logic related work vs. analog work is done in PTE? Thank You

Homework Statement Test the following integral for convergence \int^{2}_{0}\frac{dx}{1-x^{2}} Homework Equations The Attempt at a Solution So far I have brought it down to \int^{2}_{0}\frac{1}{1-x}+\frac{1}{1+x} dx However, it seems that this integral produces a...

why the mechanical efficiency and brake thermal efficiency curve increases as load increases and reaches a maximum value and then again decreases( in contand speed test)

There has been quite a few studies on the difference in the neuralanatomy pertaining to ADHD/ADD patients. Can we use this for a more objective test for ADD/ADHD on patients...

Homework Statement One charged plastic ball is vertically above another in a test tube as shown. The balls are in equilibrium a distance "d" apart. If the mass of the upper ball is reduced by a factor of four, the distance between the balls in the test tube would become : 1) 4d 2) 8d 3)...

How much blood is lost when getting a blood panel and how long does it take to replenish?

Homework Statement Hi, I'm trying to prove the p-series test, using the integral test. Everything seems to work out fine until I get into this point: Consider when p≠1 (p=1 is easy to see that it diverges, so I will ignore that one). Then we have: ∫(n)^(-p) dn = [ 1 / (-p+1) ] *...

Homework Statement Ʃ (1+n+n2)/(√1+n2+n6)) n=1 to infinity Answer is divergentHomework Equations Comparison Test / P Series 0≤an≤bn The Attempt at a Solution Hello, I simplified the problem to Ʃ (1+n+n2)/(1+n2+n6)1/2 Is it incorrect of me to say immediately right here that because the power...

Seems a real shame, apparently a control fin was faulty. http://www.bbc.co.uk/news/technology-19277620

Significant test! please help I have two questions. 1) if two sets of data have different sample numbers, then can we perform any significant test (e.g., anova, tukey had) to see whether there is a significant difference between the two sets of data? 2) This is a totally different question...

Experiments show that cosmic ray muons reach Earth surface in greater numbers than they should, unless relativistic time dilation is taken into consideration. It also seems to confirm the SR formula mathematically. However, looking at a lot of different experiment records, I have some doubts...

So harmonic series diverges because of the integral test but if I try it on ratio test = (1 / ( x+1 )) / (1 / x) = x / (x + 1) and this is less than 1 so shouldn't it converge?

I was asked this question on a test I just took and I was kinda stumped. I worked it out but I think I did it incorrectly so I was hoping for some input. Thanks. 'A' is a 3x3 matrix and 'I' is the identity matrix for a 3x3. Find the Inverse of 'A' given...

I am doing a simple steel ball drop test on glass to see if the glass passes the standards. We are dropping 1.18 inches (0.535kg) steel ball at the height of 51inches (1.295m). Now, I can calculate final velocity at the impact, but cannot calculate the actual impact force. One of the method...

I read his book "Demon Haunted World" many years ago. I recall that he referred to an experiment where a computer controlled digital readout was placed in a high location not visible to people in an emergency room of some hospital. This display showed computer controlled random words to test...

Are you expected to know all of the trig formulas for the math gre subject test? I don't mean the easy ones, i mean ones such as the sum-to-product or product-to-sum. thanks!

Hey guys, was wondering if anyone could help walk me through this problem. I am fairly sure it converges by the ratio test. Thank you. http://www.wolframalpha.com/share/clip?f=d41d8cd98f00b204e9800998ecf8427e1sgqilv5iv

Calculate the work needed too move a 1.5μC test charge from point B to D. Can someone just check if I'm thinking correctly? Do I just use the formula: W = qEd ? For the E, I calculate the magnitude and direction of the electric field at B. And I use 25cm for the distance and q = 1.5μC

I used to test orthogonality by using the definition MT = M-1, which means I always calculated the inverse of the matrices. However, isn't it true that if M is orthogonal, then MMT = I? If we multiply both side by M-1, we get MT = M-1. Can I use this to proof the orthogonality of a matrix...

Hello, I'm currently at the graduated undergrad level concerning physics and I'm considering eventually doing a PhD in America. Usually this requires a Physics GRE test, which is meant to check whether you have absorbed the necessary knowledge from the undergraduate studies. Good. Well, I...

Here are some questions that I received on my test. I got most of these wrong but I got a couple points here and there. Here are the questions I had trouble with. At the bottom on the questions I tried to solve them but I'm not sure if i did them correctly. Please try and help me because I have...

Homework Statement Determine if the vectors v1=(3,1,4), v2=(2,-3,5), v3=(5,-2,9), v4=(1,4,-1) span ℝ3 Homework Equations The Attempt at a Solution So I first arranged it as a matrix, \begin{bmatrix} \begin{array}{cccc|c} 3&2&5&1&b_1\\ 1&-3&-2&4&b_2\\...

I've been set this question by my tutor and I'm having difficulty doing it. A mass of 2 kg is hung from the lower end of a vertical spring and extends it by 40 cm. The mass is now pulled down a further 20 cm and is then released from rest so that it oscillates about the equilibrium position...

How would you test empirically for the existence of extra curled dimensions of space?

I have a data set consisting of ~10,000 patients. Each patient answered how often they had chocolate and we assigned the following values to their responses: Never= 0* 1-6 time per year = 0.01* 7-11 times per year = 0.028* 1 time per month = 0.033* 2-3 times per month = 0.08*...

Do you guys have any strategies to deal with these? It seems that my professor will put oddly worded questions on the exam as a way of weeding out the B's from the A's, and these throw me off, as well as other questions that are very challenging with the same purpose. When I say challenging, his...

Hopefully I'm posting this to the appropriate section. I am trying to figure out a formula for describing the number of possible answer "paths" that may be taken by an individual who is administered a filtered test format. In the filtered test format, the individual must select a passing...

I have a number series ranked from largest to smallest in descending order from 10 - 1. the sample is assumed to be large enough to be normally distributed. If I pick say the 8th number from the top, which statistical test should I use to calculate the probability/C.I that the number picked is...

How do we calculate the P-value from the chi-square test? Is their some formula for doing so? I want to do it by hand and not by some online calculator or application.

I have the princeton review book, and i plan on going through a calculus web tutorial online(mainly for calc 3 stuff). My school library has some pretty good books on algebra/analysis. What other kind of books should i be thinking about getting in order to do well on the test? Also, what...

Homework Statement Two test charges are located in the x–y plane. If q1 = -2.75 nC and is located at x = 0.00 m, y = 0.800 m and the second test charge has magnitude of q2 = 3.20 nC and is located at x = 1.00 m, y = 0.400 m, calculate the x and y components, Ex and Ey, of the electric...

Hello just reviewed some results for someone and thought it was quite odd. Below I have included an example of what was explained to me. Mother: 17,21 Father: 19,20 "daughter": 19,21 "Son": 17,19 By having the mother tested the "Y" chromosome should be capable of being determined...

Homework Statement The quotient test can be used to determine whether a series is converging or not. The full description is in the attachment. Homework Equations The Attempt at a Solution ( i ) Why must they both follow the same behaviour? Even if p ≠ 0, it says nothing about...

Homework Statement Does this series converge absolutely or conditionally?Homework Equations Series from n=1 to ∞ (-1)^(n+1) * n!/2^n The Attempt at a Solution In trying to apply the alternating series test, I have found the following: 1.) n!/2^n > 0 for n>0 2.) Next, in testing to see if...

I just stumbled across this on my own. I find that all leap years in the current calendar are multiples of 16. Therefore, to see if a year is a leap year, one need only to divide the year by 16 and see if there is a remainder. If so, the year is not a leap year. If not, the year is a leap...

Hey everyone! Exam practice, that time of year. In this problem 13 with correct answer C, I'm not sure how they get the test statistic: http://i.imgur.com/doar3.jpgI think they want you to use a F-test, that tests the entire model, which is calculated by: F= ((R^2)/ K)/ ((1 - R^2)/(n-K-1))...